Correctly Remove Classloaders, Avoid Loading Providers in /paper dumpplugins, Fix library lookup (#8938)

2024-12-18 04:20:08 +01:00 · 2023-03-06 19:20:11 -05:00 · 2023-03-06 19:20:11 -05:00 · 4d7269e07c
Commit 4d7269e07c
--- a/patches/api/0008-Paper-Plugins.patch
+++ b/patches/api/0008-Paper-Plugins.patch
@ -904,10 +904,10 @@ index 0000000000000000000000000000000000000000..64e46fdfa4d404cb08c67a456e5990b7
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/provider/classloader/ConfiguredPluginClassLoader.java b/src/main/java/io/papermc/paper/plugin/provider/classloader/ConfiguredPluginClassLoader.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..ab1fb50912e411e708ba1e40303b1c08dabb086d
+index 0000000000000000000000000000000000000000..a21bdc57564aef7caf43dde3b2bcb2fc7f30461c
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/provider/classloader/ConfiguredPluginClassLoader.java
-@@ -0,0 +1,63 @@
+@@ -0,0 +1,71 @@
 +package io.papermc.paper.plugin.provider.classloader;
 +
 +import io.papermc.paper.plugin.configuration.PluginMeta;
@ -970,6 +970,14 @@ index 0000000000000000000000000000000000000000..ab1fb50912e411e708ba1e40303b1c08
 +     * @return the plugin or null if it doesn't exist yet
 +     */
 +    @Nullable JavaPlugin getPlugin();
+
+    /**
+     * Get the plugin classloader group
+     * that is used by the underlying classloader
+     * @return classloader
+     */
+    @Nullable
+    PluginClassLoaderGroup getGroup();
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/provider/classloader/PaperClassLoaderStorage.java b/src/main/java/io/papermc/paper/plugin/provider/classloader/PaperClassLoaderStorage.java
 new file mode 100644
@ -1969,7 +1977,7 @@ index 669a70faa95d0d6525a731d73499ed6fb0b48320..c9cf9d361a1289aba383718733a2098b
             throw new IllegalStateException("Cannot get plugin for " + clazz + " from a static initializer");
         }
 diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
-index 047c0304fd617cec990f80815b43916c6ef5a94c..d0ad072c832b8fc8a1cfdcafdd42c724531a2e29 100644
+index 047c0304fd617cec990f80815b43916c6ef5a94c..ab04ffe4cd05315a2ee0f64c553b4c674740eb7f 100644
 --- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
@@ -49,6 +49,7 @@ import org.yaml.snakeyaml.error.YAMLException;
@ -1993,7 +2001,7 @@ index 047c0304fd617cec990f80815b43916c6ef5a94c..d0ad072c832b8fc8a1cfdcafdd42c724
         final PluginClassLoader loader;
         try {
 -            loader = new PluginClassLoader(this, getClass().getClassLoader(), description, dataFolder, file, (libraryLoader != null) ? libraryLoader.createLoader(description) : null);
-+            loader = new PluginClassLoader(getClass().getClassLoader(), description, dataFolder, file, (libraryLoader != null) ? libraryLoader.createLoader(description) : null, null); // Paper
+            loader = new PluginClassLoader(getClass().getClassLoader(), description, dataFolder, file, (libraryLoader != null) ? libraryLoader.createLoader(description) : null, null, null); // Paper
         } catch (InvalidPluginException ex) {
             throw ex;
         } catch (Throwable ex) {
@ -2032,7 +2040,7 @@ index 6d634b0ea813ccb19f1562a7d0e5a59cea4eab21..e4b6f278a811acbb0070e311c5c3bdaf
         }
 
 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc6238bce65f 100644
+index 2f74ec96ece706de23156ebabfe493211bc05391..2d2fa6ce5200eb5c75a733f9f54f400113cc22b0 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -29,7 +29,8 @@ import org.jetbrains.annotations.Nullable;
@ -2045,12 +2053,13 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
     private final JavaPluginLoader loader;
     private final Map<String, Class<?>> classes = new ConcurrentHashMap<String, Class<?>>();
     private final PluginDescriptionFile description;
-@@ -43,24 +44,30 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -43,24 +44,32 @@ final class PluginClassLoader extends URLClassLoader {
     private JavaPlugin pluginInit;
     private IllegalStateException pluginState;
     private final Set<String> seenIllegalAccess = Collections.newSetFromMap(new ConcurrentHashMap<>());
 +    private java.util.logging.Logger logger; // Paper - add field
 +    private io.papermc.paper.plugin.provider.classloader.PluginClassLoaderGroup classLoaderGroup; // Paper
+    public io.papermc.paper.plugin.provider.entrypoint.DependencyContext dependencyContext; // Paper
 
     static {
         ClassLoader.registerAsParallelCapable();
@ -2058,7 +2067,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
 
 -    PluginClassLoader(@NotNull final JavaPluginLoader loader, @Nullable final ClassLoader parent, @NotNull final PluginDescriptionFile description, @NotNull final File dataFolder, @NotNull final File file, @Nullable ClassLoader libraryLoader) throws IOException, InvalidPluginException, MalformedURLException {
 +    @org.jetbrains.annotations.ApiStatus.Internal // Paper
-+    public PluginClassLoader(@Nullable final ClassLoader parent, @NotNull final PluginDescriptionFile description, @NotNull final File dataFolder, @NotNull final File file, @Nullable ClassLoader libraryLoader, @Nullable JarFile jarFile) throws IOException, InvalidPluginException, MalformedURLException { // Paper // Paper - use JarFile provided by SpigotPluginProvider
+    public PluginClassLoader(@Nullable final ClassLoader parent, @NotNull final PluginDescriptionFile description, @NotNull final File dataFolder, @NotNull final File file, @Nullable ClassLoader libraryLoader, @Nullable JarFile jarFile, io.papermc.paper.plugin.provider.entrypoint.DependencyContext dependencyContext) throws IOException, InvalidPluginException, MalformedURLException { // Paper // Paper - use JarFile provided by SpigotPluginProvider
         super(new URL[] {file.toURI().toURL()}, parent);
 -        Preconditions.checkArgument(loader != null, "Loader cannot be null");
 +        this.loader = null; // Paper - pass null into loader field
@ -2075,12 +2084,13 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
 
 +
 +        // Paper start
-+        this.classLoaderGroup = io.papermc.paper.plugin.provider.classloader.PaperClassLoaderStorage.instance().registerSpigotGroup(this); // Paper
+        this.dependencyContext = dependencyContext;
+        this.classLoaderGroup = io.papermc.paper.plugin.provider.classloader.PaperClassLoaderStorage.instance().registerSpigotGroup(this);
 +        // Paper end
         try {
             Class<?> jarClass;
             try {
-@@ -94,6 +101,27 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -94,6 +103,27 @@ final class PluginClassLoader extends URLClassLoader {
         return findResources(name);
     }
 
@ -2108,7 +2118,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
     @Override
     protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
         return loadClass0(name, resolve, true, true);
-@@ -119,26 +147,11 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -119,26 +149,11 @@ final class PluginClassLoader extends URLClassLoader {
 
         if (checkGlobal) {
             // This ignores the libraries of other plugins, unless they are transitive dependencies.
@ -2137,7 +2147,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
 
                 return result;
             }
-@@ -167,7 +180,7 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -167,7 +182,7 @@ final class PluginClassLoader extends URLClassLoader {
                     throw new ClassNotFoundException(name, ex);
                 }
 
@ -2146,7 +2156,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
 
                 int dot = name.lastIndexOf('.');
                 if (dot != -1) {
-@@ -197,8 +210,8 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -197,8 +212,8 @@ final class PluginClassLoader extends URLClassLoader {
                 result = super.findClass(name);
             }
 
@ -2156,7 +2166,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
         }
 
         return result;
-@@ -207,6 +220,12 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -207,6 +222,12 @@ final class PluginClassLoader extends URLClassLoader {
     @Override
     public void close() throws IOException {
         try {
@ -2169,7 +2179,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
             super.close();
         } finally {
             jar.close();
-@@ -218,7 +237,7 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -218,7 +239,7 @@ final class PluginClassLoader extends URLClassLoader {
         return classes.values();
     }
 
@ -2178,7 +2188,7 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
         Preconditions.checkArgument(javaPlugin != null, "Initializing plugin cannot be null");
         Preconditions.checkArgument(javaPlugin.getClass().getClassLoader() == this, "Cannot initialize plugin outside of this class loader");
         if (this.plugin != null || this.pluginInit != null) {
-@@ -228,6 +247,32 @@ final class PluginClassLoader extends URLClassLoader {
+@@ -228,6 +249,38 @@ final class PluginClassLoader extends URLClassLoader {
         pluginState = new IllegalStateException("Initial initialization");
         this.pluginInit = javaPlugin;
 
@ -2210,6 +2220,12 @@ index 2f74ec96ece706de23156ebabfe493211bc05391..c42663a2ae98fda6dcf2ab6ac899cc62
 +            org.bukkit.configuration.serialization.ConfigurationSerialization.unregisterClass(serializable);
 +        }
     }
+
+    @Override
+    public @Nullable io.papermc.paper.plugin.provider.classloader.PluginClassLoaderGroup getGroup() {
+        return this.classLoaderGroup;
+    }
+
 +    // Paper end
 }
 diff --git a/src/test/java/io/papermc/paper/testing/TestServer.java b/src/test/java/io/papermc/paper/testing/TestServer.java
--- a/patches/api/0072-Add-workaround-for-plugins-modifying-the-parent-of-t.patch
+++ b/patches/api/0072-Add-workaround-for-plugins-modifying-the-parent-of-t.patch
@ -93,19 +93,19 @@ index 71c8d2345eef6895edb8d210553ec3cddd9c76d0..6d31f3a2569ae9c522a5e6cddd38ac8f
 
     /**
 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index c42663a2ae98fda6dcf2ab6ac899cc6238bce65f..ed2492ce51097dd0c2ba72e7b9449561a73ea7e3 100644
+index 2f045068c34c7c007565b7d7a17b7a003a79f37b..805f2bef4a785cb9639afd40ef820452efd1b2cf 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-@@ -64,7 +64,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
+@@ -65,7 +65,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
         this.url = file.toURI().toURL();
         this.libraryLoader = libraryLoader;
 
 -
 +        this.logger = com.destroystokyo.paper.utils.PaperPluginLogger.getLogger(description); // Paper - Register logger early
         // Paper start
-         this.classLoaderGroup = io.papermc.paper.plugin.provider.classloader.PaperClassLoaderStorage.instance().registerSpigotGroup(this); // Paper
-         // Paper end
-@@ -247,6 +247,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
+         this.dependencyContext = dependencyContext;
+         this.classLoaderGroup = io.papermc.paper.plugin.provider.classloader.PaperClassLoaderStorage.instance().registerSpigotGroup(this);
+@@ -249,6 +249,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
         pluginState = new IllegalStateException("Initial initialization");
         this.pluginInit = javaPlugin;
 
--- a/patches/api/0231-Enable-multi-release-plugin-jars.patch
+++ b/patches/api/0231-Enable-multi-release-plugin-jars.patch
@ -5,10 +5,10 @@ Subject: [PATCH] Enable multi-release plugin jars


 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index ed2492ce51097dd0c2ba72e7b9449561a73ea7e3..9c409dcd0179bea236311e1d5998daa4245e1542 100644
+index 805f2bef4a785cb9639afd40ef820452efd1b2cf..caffe498ef5abf09944f846bf5a958b10de514df 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-@@ -59,7 +59,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
+@@ -60,7 +60,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
         this.description = description;
         this.dataFolder = dataFolder;
         this.file = file;
--- a/patches/api/0309-Rewrite-LogEvents-to-contain-the-source-jars-in-stac.patch
+++ b/patches/api/0309-Rewrite-LogEvents-to-contain-the-source-jars-in-stac.patch
@ -5,13 +5,13 @@ Subject: [PATCH] Rewrite LogEvents to contain the source jars in stack traces


 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index 9c409dcd0179bea236311e1d5998daa4245e1542..bfc4a97f1fb0d245056598d5211ff2347a431b64 100644
+index caffe498ef5abf09944f846bf5a958b10de514df..b3429d739c74d8b6b692a47ab49b0f0de1e5ea8f 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-@@ -53,7 +53,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
+@@ -54,7 +54,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
 
     @org.jetbrains.annotations.ApiStatus.Internal // Paper
-     public PluginClassLoader(@Nullable final ClassLoader parent, @NotNull final PluginDescriptionFile description, @NotNull final File dataFolder, @NotNull final File file, @Nullable ClassLoader libraryLoader, @Nullable JarFile jarFile) throws IOException, InvalidPluginException, MalformedURLException { // Paper // Paper - use JarFile provided by SpigotPluginProvider
+     public PluginClassLoader(@Nullable final ClassLoader parent, @NotNull final PluginDescriptionFile description, @NotNull final File dataFolder, @NotNull final File file, @Nullable ClassLoader libraryLoader, @Nullable JarFile jarFile, io.papermc.paper.plugin.provider.entrypoint.DependencyContext dependencyContext) throws IOException, InvalidPluginException, MalformedURLException { // Paper // Paper - use JarFile provided by SpigotPluginProvider
 -        super(new URL[] {file.toURI().toURL()}, parent);
 +        super(file.getName(), new URL[] {file.toURI().toURL()}, parent);
         this.loader = null; // Paper - pass null into loader field
--- a/patches/api/0382-Also-load-resources-from-LibraryLoader.patch
+++ b/patches/api/0382-Also-load-resources-from-LibraryLoader.patch
@ -5,10 +5,10 @@ Subject: [PATCH] Also load resources from LibraryLoader


 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index bfc4a97f1fb0d245056598d5211ff2347a431b64..e89ab347b908cc92274dd5dd796a02249f899977 100644
+index b3429d739c74d8b6b692a47ab49b0f0de1e5ea8f..526d313d0922c0c1ce9fbfad14e0bfa1fe86caf2 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-@@ -93,14 +93,35 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
+@@ -95,14 +95,35 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
 
     @Override
     public URL getResource(String name) {
--- a/patches/server/0013-Paper-Plugins.patch
+++ b/patches/server/0013-Paper-Plugins.patch
@ -258,10 +258,10 @@ index 0000000000000000000000000000000000000000..f0fce4113fb07c64adbec029d177c236
 +}
 diff --git a/src/main/java/io/papermc/paper/command/subcommands/DumpPluginsCommand.java b/src/main/java/io/papermc/paper/command/subcommands/DumpPluginsCommand.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..4ecd00b32c7abc15d655dd3c999b6feca332c3a1
+index 0000000000000000000000000000000000000000..7159c72408f556d676eded668057a4c5ebb21719
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/command/subcommands/DumpPluginsCommand.java
-@@ -0,0 +1,187 @@
+@@ -0,0 +1,200 @@
 +package io.papermc.paper.command.subcommands;
 +
 +import com.google.gson.JsonArray;
@ -276,6 +276,8 @@ index 0000000000000000000000000000000000000000..4ecd00b32c7abc15d655dd3c999b6fec
 +import io.papermc.paper.plugin.entrypoint.classloader.group.LockingClassLoaderGroup;
 +import io.papermc.paper.plugin.entrypoint.classloader.group.PaperPluginClassLoaderStorage;
 +import io.papermc.paper.plugin.entrypoint.classloader.group.SimpleListPluginClassLoaderGroup;
+import io.papermc.paper.plugin.entrypoint.classloader.group.SpigotPluginClassLoaderGroup;
+import io.papermc.paper.plugin.entrypoint.classloader.group.StaticPluginClassLoaderGroup;
 +import io.papermc.paper.plugin.provider.entrypoint.DependencyContext;
 +import io.papermc.paper.plugin.entrypoint.strategy.ModernPluginLoadingStrategy;
 +import io.papermc.paper.plugin.entrypoint.strategy.ProviderConfiguration;
@ -390,10 +392,15 @@ index 0000000000000000000000000000000000000000..4ecd00b32c7abc15d655dd3c999b6fec
 +
 +                @Override
 +                public boolean load(PluginProvider<Object> provider, Object provided) {
+                    return true;
+                }
+
+                @Override
+                public boolean preloadProvider(PluginProvider<Object> provider) {
+                    // Don't load provider
 +                    loadOrder.add(provider.getMeta().getName());
 +                    return false;
 +                }
-+
 +            });
 +            modernPluginLoadingStrategy.loadProviders(pluginProviders);
 +
@ -430,6 +437,12 @@ index 0000000000000000000000000000000000000000..4ecd00b32c7abc15d655dd3c999b6fec
 +        if (group instanceof SimpleListPluginClassLoaderGroup listGroup) {
 +            JsonArray array = new JsonArray();
 +            classLoadersRoot.addProperty("main", listGroup.toString());
+            if (group instanceof StaticPluginClassLoaderGroup staticPluginClassLoaderGroup) {
+                classLoadersRoot.addProperty("plugin-holder", staticPluginClassLoaderGroup.getPluginClassloader().toString());
+            } else if (group instanceof SpigotPluginClassLoaderGroup spigotPluginClassLoaderGroup) {
+                classLoadersRoot.addProperty("plugin-holder", spigotPluginClassLoaderGroup.getPluginClassLoader().toString());
+            }
+
 +            classLoadersRoot.add("children", array);
 +            for (ConfiguredPluginClassLoader innerGroup : listGroup.getClassLoaders()) {
 +                array.add(this.writeClassloader(innerGroup));
@ -803,10 +816,10 @@ index 0000000000000000000000000000000000000000..f9a2c55a354c877749db3f92956de802
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperPluginClassLoader.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperPluginClassLoader.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..79581d917e754998123b94b9f4ea7d1e78f017ae
+index 0000000000000000000000000000000000000000..ecd11d3bd6c7e80a9b33cb8c2d7ed8a582857533
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperPluginClassLoader.java
-@@ -0,0 +1,202 @@
+@@ -0,0 +1,207 @@
 +package io.papermc.paper.plugin.entrypoint.classloader;
 +
 +import io.papermc.paper.plugin.configuration.PluginMeta;
@ -1008,6 +1021,11 @@ index 0000000000000000000000000000000000000000..79581d917e754998123b94b9f4ea7d1e
 +            super.close();
 +        }
 +    }
+
+    @Override
+    public @Nullable PluginClassLoaderGroup getGroup() {
+        return this.group;
+    }
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperSimplePluginClassLoader.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperSimplePluginClassLoader.java
 new file mode 100644
@ -1186,7 +1204,7 @@ index 0000000000000000000000000000000000000000..eaf5c794cbe8d6138c9d60eaae20f5fc
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/GlobalPluginClassLoaderGroup.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/GlobalPluginClassLoaderGroup.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..2b7eef787f83e5a32896cb30c215406b6f652786
+index 0000000000000000000000000000000000000000..2a4933088928a51c8135a3a60b7447d9d10c66c4
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/GlobalPluginClassLoaderGroup.java
@@ -0,0 +1,18 @@
@ -1205,7 +1223,7 @@ index 0000000000000000000000000000000000000000..2b7eef787f83e5a32896cb30c215406b
 +
 +    @Override
 +    public String toString() {
-+        return super.toString();
+        return "GLOBAL:" + super.toString();
 +    }
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/LockingClassLoaderGroup.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/LockingClassLoaderGroup.java
@ -1292,7 +1310,7 @@ index 0000000000000000000000000000000000000000..aae50ebba6ba1579b75af5370c8b020d
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/PaperPluginClassLoaderStorage.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/PaperPluginClassLoaderStorage.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0fbc1227c6
+index 0000000000000000000000000000000000000000..e6fcdeb96356ff4713627b1458ac8bbfad1866b1
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/PaperPluginClassLoaderStorage.java
@@ -0,0 +1,93 @@
@ -1302,7 +1320,6 @@ index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0f
 +import io.papermc.paper.plugin.provider.classloader.ConfiguredPluginClassLoader;
 +import io.papermc.paper.plugin.provider.classloader.PaperClassLoaderStorage;
 +import io.papermc.paper.plugin.provider.classloader.PluginClassLoaderGroup;
-+import org.bukkit.Bukkit;
 +import org.bukkit.plugin.java.PluginClassLoader;
 +import org.jetbrains.annotations.ApiStatus;
 +
@ -1325,8 +1342,8 @@ index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0f
 +    @Override
 +    public PluginClassLoaderGroup registerSpigotGroup(PluginClassLoader pluginClassLoader) {
 +        return this.registerGroup(pluginClassLoader, new SpigotPluginClassLoaderGroup(this.globalGroup, (library) -> {
-+            return Bukkit.getServer().getPluginManager().isTransitiveDependency(pluginClassLoader.getConfiguration(), library.getConfiguration());
-+        }));
+            return pluginClassLoader.dependencyContext.isTransitiveDependency(pluginClassLoader.getConfiguration(), library.getConfiguration());
+        }, pluginClassLoader));
 +    }
 +
 +    @Override
@ -1343,7 +1360,7 @@ index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0f
 +            }
 +        }
 +
-+        return this.registerGroup(classLoader, new StaticPluginClassLoaderGroup(allowedLoaders, access));
+        return this.registerGroup(classLoader, new StaticPluginClassLoaderGroup(allowedLoaders, access, classLoader));
 +    }
 +
 +    private PluginClassLoaderGroup registerGroup(ConfiguredPluginClassLoader classLoader, PluginClassLoaderGroup group) {
@ -1362,6 +1379,7 @@ index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0f
 +    @Override
 +    public void unregisterClassloader(ConfiguredPluginClassLoader configuredPluginClassLoader) {
 +        this.globalGroup.remove(configuredPluginClassLoader);
+        this.groups.remove(configuredPluginClassLoader.getGroup());
 +        for (PluginClassLoaderGroup group : this.groups) {
 +            group.remove(configuredPluginClassLoader);
 +        }
@ -1372,7 +1390,7 @@ index 0000000000000000000000000000000000000000..2c906e2c7d972b221a41acd614e00d0f
 +        if (this.globalGroup.getClassLoaders().contains(pluginLoader)) {
 +            return false;
 +        } else {
-+            this.globalGroup.getClassLoaders().add(pluginLoader);
+            this.globalGroup.add(pluginLoader);
 +            return true;
 +        }
 +    }
@ -1532,14 +1550,15 @@ index 0000000000000000000000000000000000000000..3b670bd6b35ae7f56488a9b50df54709
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/SpigotPluginClassLoaderGroup.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/SpigotPluginClassLoaderGroup.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..5d26367524389388be163ae3120c1d2bf55cfef7
+index 0000000000000000000000000000000000000000..5a9f5b18e24a89dd642149a7a3d49390328b864b
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/SpigotPluginClassLoaderGroup.java
-@@ -0,0 +1,49 @@
+@@ -0,0 +1,58 @@
 +package io.papermc.paper.plugin.entrypoint.classloader.group;
 +
 +import io.papermc.paper.plugin.provider.classloader.ClassLoaderAccess;
 +import io.papermc.paper.plugin.provider.classloader.ConfiguredPluginClassLoader;
+import org.bukkit.plugin.java.PluginClassLoader;
 +import org.jetbrains.annotations.ApiStatus;
 +
 +import java.util.function.Predicate;
@ -1552,10 +1571,12 @@ index 0000000000000000000000000000000000000000..5d26367524389388be163ae3120c1d2b
 +public class SpigotPluginClassLoaderGroup extends SimpleListPluginClassLoaderGroup {
 +
 +    private final Predicate<ConfiguredPluginClassLoader> libraryClassloaderPredicate;
+    private final PluginClassLoader pluginClassLoader;
 +
-+    public SpigotPluginClassLoaderGroup(GlobalPluginClassLoaderGroup globalPluginClassLoaderGroup, Predicate<ConfiguredPluginClassLoader> libraryClassloaderPredicate) {
+    public SpigotPluginClassLoaderGroup(GlobalPluginClassLoaderGroup globalPluginClassLoaderGroup, Predicate<ConfiguredPluginClassLoader> libraryClassloaderPredicate, PluginClassLoader pluginClassLoader) {
 +        super(globalPluginClassLoaderGroup.getClassLoaders());
 +        this.libraryClassloaderPredicate = libraryClassloaderPredicate;
+        this.pluginClassLoader = pluginClassLoader;
 +    }
 +
 +    // Mirrors global list
@ -1567,14 +1588,20 @@ index 0000000000000000000000000000000000000000..5d26367524389388be163ae3120c1d2b
 +    public void remove(ConfiguredPluginClassLoader configuredPluginClassLoader) {
 +    }
 +
+    // Don't allow other plugins to access spigot dependencies, they should instead reference the global list
+    @Override
+    public ClassLoaderAccess getAccess() {
+        return v -> false;
+    }
+
 +    @Override
 +    protected Class<?> lookupClass(String name, boolean resolve, ConfiguredPluginClassLoader current) throws ClassNotFoundException {
 +        return current.loadClass(name, resolve, false, this.libraryClassloaderPredicate.test(current));
 +    }
 +
-+    @Override
-+    public ClassLoaderAccess getAccess() {
-+        return v -> true;
+    // DEBUG
+    public PluginClassLoader getPluginClassLoader() {
+        return pluginClassLoader;
 +    }
 +
 +    @Override
@ -1587,10 +1614,10 @@ index 0000000000000000000000000000000000000000..5d26367524389388be163ae3120c1d2b
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/StaticPluginClassLoaderGroup.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/StaticPluginClassLoaderGroup.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..7f7085b06271adf8a37485f4c9c9b8af605dd27d
+index 0000000000000000000000000000000000000000..2412155ddfd559023f42ff534b8f06a52588e1e0
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/group/StaticPluginClassLoaderGroup.java
-@@ -0,0 +1,31 @@
+@@ -0,0 +1,40 @@
 +package io.papermc.paper.plugin.entrypoint.classloader.group;
 +
 +import io.papermc.paper.plugin.provider.classloader.ClassLoaderAccess;
@ -1603,10 +1630,13 @@ index 0000000000000000000000000000000000000000..7f7085b06271adf8a37485f4c9c9b8af
 +public class StaticPluginClassLoaderGroup extends SimpleListPluginClassLoaderGroup {
 +
 +    private final ClassLoaderAccess access;
+    // Debug only
+    private final ConfiguredPluginClassLoader mainClassloaderHolder;
 +
-+    public StaticPluginClassLoaderGroup(List<ConfiguredPluginClassLoader> classloaders, ClassLoaderAccess access) {
+    public StaticPluginClassLoaderGroup(List<ConfiguredPluginClassLoader> classloaders, ClassLoaderAccess access, ConfiguredPluginClassLoader mainClassloaderHolder) {
 +        super(classloaders);
 +        this.access = access;
+        this.mainClassloaderHolder = mainClassloaderHolder;
 +    }
 +
 +    @Override
@ -1614,6 +1644,12 @@ index 0000000000000000000000000000000000000000..7f7085b06271adf8a37485f4c9c9b8af
 +        return this.access;
 +    }
 +
+    // DEBUG
+    @ApiStatus.Internal
+    public ConfiguredPluginClassLoader getPluginClassloader() {
+        return this.mainClassloaderHolder;
+    }
+
 +    @Override
 +    public String toString() {
 +        return "StaticPluginClassLoaderGroup{" +
@ -2404,10 +2440,10 @@ index 0000000000000000000000000000000000000000..779f6980a71db8df68c9cf2078497640
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ModernPluginLoadingStrategy.java b/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ModernPluginLoadingStrategy.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..671e9ebb8246a4cc9e212f5b11ea476560f2f7d5
+index 0000000000000000000000000000000000000000..1d58f3a438d5be423c84b2f61e496d938fdc2995
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ModernPluginLoadingStrategy.java
-@@ -0,0 +1,209 @@
+@@ -0,0 +1,211 @@
 +package io.papermc.paper.plugin.entrypoint.strategy;
 +
 +import com.google.common.collect.Lists;
@ -2556,9 +2592,11 @@ index 0000000000000000000000000000000000000000..671e9ebb8246a4cc9e212f5b11ea4765
 +            try {
 +                this.configuration.applyContext(retrievedProvider, graphDependencyContext);
 +
-+                T instance = retrievedProvider.createInstance();
-+                if (this.configuration.load(retrievedProvider, instance)) {
-+                    loadedPlugins.add(new ProviderPair<>(retrievedProvider, instance));
+                if (this.configuration.preloadProvider(retrievedProvider)) {
+                    T instance = retrievedProvider.createInstance();
+                    if (this.configuration.load(retrievedProvider, instance)) {
+                        loadedPlugins.add(new ProviderPair<>(retrievedProvider, instance));
+                    }
 +                }
 +            } catch (Throwable ex) {
 +                LOGGER.error("Could not load plugin '%s' in folder '%s'".formatted(retrievedProvider.getFileName(), retrievedProvider.getParentSource()), ex); // Paper
@ -2644,17 +2682,15 @@ index 0000000000000000000000000000000000000000..2ea978ac957849260e7ca69c9ff56588
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ProviderConfiguration.java b/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ProviderConfiguration.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..71536981075095ee06234c638c0dfa054e737fb8
+index 0000000000000000000000000000000000000000..2c7a0751e5c8d0d1e42f7e245ba09815d4f6f8ff
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ProviderConfiguration.java
-@@ -0,0 +1,19 @@
+@@ -0,0 +1,21 @@
 +package io.papermc.paper.plugin.entrypoint.strategy;
 +
 +import io.papermc.paper.plugin.provider.PluginProvider;
 +import io.papermc.paper.plugin.provider.entrypoint.DependencyContext;
 +
-+import java.util.List;
-+
 +/**
 + * Used to share code with the modern and legacy plugin load strategy.
 + *
@ -2666,6 +2702,10 @@ index 0000000000000000000000000000000000000000..71536981075095ee06234c638c0dfa05
 +
 +    boolean load(PluginProvider<T> provider, T provided);
 +
+    default boolean preloadProvider(PluginProvider<T> provider) {
+        return true;
+    }
+
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ProviderLoadingStrategy.java b/src/main/java/io/papermc/paper/plugin/entrypoint/strategy/ProviderLoadingStrategy.java
 new file mode 100644
@ -4937,7 +4977,7 @@ index 0000000000000000000000000000000000000000..a180612a1ec395202dbae1ca5b97ec01
 +}
 diff --git a/src/main/java/io/papermc/paper/plugin/provider/source/DirectoryProviderSource.java b/src/main/java/io/papermc/paper/plugin/provider/source/DirectoryProviderSource.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..1822e076601db51c8a7954036853bee1fb8e3704
+index 0000000000000000000000000000000000000000..ed00c412f1703b38674bbd0d483fcb100aa99f9d
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/provider/source/DirectoryProviderSource.java
@@ -0,0 +1,40 @@
@ -4960,7 +5000,7 @@ index 0000000000000000000000000000000000000000..1822e076601db51c8a7954036853bee1
 +    private static final Logger LOGGER = LogUtils.getLogger();
 +
 +    public DirectoryProviderSource() {
-+        super("Directory '%s'"::formatted);
+        super("File '%s'"::formatted);
 +    }
 +
 +    @Override
@ -5826,6 +5866,7 @@ index 0000000000000000000000000000000000000000..36f8dc31394333bb9aaa9341014037a4
 +import com.destroystokyo.paper.util.SneakyThrow;
 +import com.destroystokyo.paper.utils.PaperPluginLogger;
 +import io.papermc.paper.plugin.entrypoint.dependency.DependencyUtil;
+import io.papermc.paper.plugin.manager.PaperPluginManagerImpl;
 +import io.papermc.paper.plugin.provider.configuration.LoadOrderConfiguration;
 +import io.papermc.paper.plugin.provider.entrypoint.DependencyContext;
 +import io.papermc.paper.plugin.entrypoint.dependency.DependencyContextHolder;
@ -5942,7 +5983,7 @@ index 0000000000000000000000000000000000000000..36f8dc31394333bb9aaa9341014037a4
 +
 +            final PluginClassLoader loader;
 +            try {
-+                loader = new PluginClassLoader(this.getClass().getClassLoader(), this.description, dataFolder, this.path.toFile(), LIBRARY_LOADER.createLoader(this.description), this.jarFile); // Paper
+                loader = new PluginClassLoader(this.getClass().getClassLoader(), this.description, dataFolder, this.path.toFile(), LIBRARY_LOADER.createLoader(this.description), this.jarFile, this.dependencyContext); // Paper
 +            } catch (InvalidPluginException ex) {
 +                throw ex;
 +            } catch (Throwable ex) {
@ -5951,8 +5992,7 @@ index 0000000000000000000000000000000000000000..36f8dc31394333bb9aaa9341014037a4
 +
 +            // Override dependency context.
 +            // We must provide a temporary context in order to properly handle dependencies on the plugin classloader constructor.
-+            // EDIT - Only re add if dependency checking is needed for spigot plugins, but not anymore.
-+            // loader.dependencyContext = PaperPluginManagerImpl.getInstance();
+            loader.dependencyContext = PaperPluginManagerImpl.getInstance();
 +
 +
 +            this.status = ProviderStatus.INITIALIZED;