[PY-76337] disable plugins with use-idea-classloader if appcds is enable

GitOrigin-RevId: 6097121559ae18571cad8ee239fe8dda9e085f85

platform/core-impl/src/com/intellij/ide/plugins/ClassLoaderConfigurator.kt

@@ -470,7 +470,15 @@ private fun createModuleContentBasedScope(descriptor: IdeaPluginDescriptorImpl):
       }
       return ""
     }
-  }}
+  }
+}
+
+internal val canExtendIdeaClassLoader: Boolean by lazy {
+  runCatching {
+    MethodHandles.lookup().findVirtual(ClassLoaderConfigurator::class.java.classLoader.javaClass, "addFiles",
+                                       MethodType.methodType(Void.TYPE, MutableList::class.java))
+  }.isSuccess
+}
 
 private fun configureUsingIdeaClassloader(classPath: List<Path>, descriptor: IdeaPluginDescriptorImpl): ClassLoader {
   log.warn("${descriptor.pluginId} uses deprecated `use-idea-classloader` attribute")

platform/core-impl/src/com/intellij/ide/plugins/PluginSetBuilder.kt

@@ -12,8 +12,6 @@ import org.jetbrains.annotations.Nls
 import org.jetbrains.annotations.PropertyKey
 import java.util.*
 import java.util.function.Supplier
-import kotlin.collections.ArrayList
-import kotlin.collections.HashMap
 
 @ApiStatus.Internal
 class PluginSetBuilder(@JvmField val unsortedPlugins: Set<IdeaPluginDescriptorImpl>) {
@@ -88,6 +86,12 @@ class PluginSetBuilder(@JvmField val unsortedPlugins: Set<IdeaPluginDescriptorIm
     val disabledModuleToProblematicPlugin = HashMap<String, PluginId>()
 
     m@ for (module in moduleGraph.nodes) {
+      if (module.isUseIdeaClassLoader && !canExtendIdeaClassLoader) {
+        module.isEnabled = false
+        logMessages.add("Module ${module.moduleName ?: module.pluginId} is not enabled because it uses deprecated `use-idea-classloader` attribute but PathClassLoader is disabled")
+        continue@m
+      }
+
       if (module.moduleName == null) {
         if (module.pluginId != PluginManagerCore.CORE_ID && (!module.isEnabled || (disabler != null && disabler(module)))) {
           continue

platform/workspace/jps/tests/testResources/META-INF/plugin.xml

@@ -1,4 +1,4 @@
-<idea-plugin use-idea-classloader="true">
+<idea-plugin>
   <id>com.intellij.workspace.ide.tests</id>
   <name>com.intellij.workspace.ide.tests</name>