[Native][IR] Move verbose RTTI for local classes and anonymous objects

^KT-45304

kotlin-native/runtime/src/main/cpp/TypeInfo.h

@@ -56,6 +56,8 @@ enum Konan_TypeFlags {
   TF_SUSPEND_FUNCTION = 1 << 5,
   TF_HAS_FINALIZER = 1 << 6,
   TF_HAS_FREEZE_HOOK = 1 << 7,
+  TF_REFLECTION_SHOW_PKG_NAME = 1 << 8, // If package name is available in reflection, e.g. in `KClass.qualifiedName`.
+  TF_REFLECTION_SHOW_REL_NAME = 1 << 9 // If relative name is available in reflection, e.g. in `KClass.simpleName`.
 };
 
 // Flags per object instance.
@@ -115,13 +117,12 @@ struct TypeInfo {
     int32_t interfaceTableSize_;
     InterfaceTableRecord const* interfaceTable_;
 
-    // String for the fully qualified dot-separated name of the package containing class,
-    // or `null` if the class is local or anonymous.
+    // String for the fully qualified dot-separated name of the package containing class.
     ObjHeader* packageName_;
 
     // String for the qualified class name relative to the containing package
-    // (e.g. TopLevel.Nested1.Nested2), or simple class name if it is local,
-    // or `null` if the class is anonymous.
+    // (e.g. TopLevel.Nested1.Nested2) or the effective class name computed for
+    // local class or anonymous object (e.g. listOf$1).
     ObjHeader* relativeName_;
 
     // Various flags.

kotlin-native/runtime/src/main/cpp/Types.cpp

@@ -55,12 +55,22 @@ KBoolean Kotlin_TypeInfo_isInstance(KConstRef obj, KNativePtr typeInfo) {
   return IsInstance(obj, reinterpret_cast<const TypeInfo*>(typeInfo));
 }
 
-OBJ_GETTER(Kotlin_TypeInfo_getPackageName, KNativePtr typeInfo) {
-  RETURN_OBJ(reinterpret_cast<const TypeInfo*>(typeInfo)->packageName_);
+OBJ_GETTER(Kotlin_TypeInfo_getPackageName, KNativePtr typeInfo, KBoolean checkFlags) {
+  const TypeInfo* type_info = reinterpret_cast<const TypeInfo*>(typeInfo);
+  if (!checkFlags || type_info->flags_ & TF_REFLECTION_SHOW_PKG_NAME) {
+    RETURN_OBJ(type_info->packageName_);
+  } else {
+    return NULL;
+  }
 }
 
-OBJ_GETTER(Kotlin_TypeInfo_getRelativeName, KNativePtr typeInfo) {
-  RETURN_OBJ(reinterpret_cast<const TypeInfo*>(typeInfo)->relativeName_);
+OBJ_GETTER(Kotlin_TypeInfo_getRelativeName, KNativePtr typeInfo, KBoolean checkFlags) {
+  const TypeInfo* type_info = reinterpret_cast<const TypeInfo*>(typeInfo);
+  if (!checkFlags || type_info->flags_ & TF_REFLECTION_SHOW_REL_NAME) {
+    RETURN_OBJ(type_info->relativeName_);
+  } else {
+    return NULL;
+  }
 }
 
 struct AssociatedObjectTableRecord {

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/KClassImpl.kt

@@ -9,25 +9,15 @@ import kotlin.reflect.KClass
 
 @ExportForCompiler
 internal class KClassImpl<T : Any>(private val typeInfo: NativePtr) : KClass<T> {
+    // TODO: consider replacing '$' by another delimeter that can't be used in class name specified with backticks (``)
     override val simpleName: String?
-        get() {
-            val relativeName = getRelativeName(typeInfo)
-                    ?: return null
-
-            return relativeName.substringAfterLast(".")
-        }
+        get() = getRelativeName(typeInfo, true)?.substringAfterLast('.')?.substringAfterLast('$')
 
     override val qualifiedName: String?
         get() {
-            val packageName = getPackageName(typeInfo)
-                    ?: return null
-
-            val relativeName = getRelativeName(typeInfo)!!
-            return if (packageName.isEmpty()) {
-                relativeName
-            } else {
-                "$packageName.$relativeName"
-            }
+            val packageName = getPackageName(typeInfo, true) ?: return null
+            val relativeName = getRelativeName(typeInfo, true) ?: return null
+            return if (packageName.isEmpty()) relativeName else "$packageName.$relativeName"
         }
 
     override fun isInstance(value: Any?): Boolean = value != null && isInstance(value, this.typeInfo)
@@ -38,7 +28,13 @@ internal class KClassImpl<T : Any>(private val typeInfo: NativePtr) : KClass<T>
     override fun hashCode(): Int = typeInfo.hashCode()
 
     override fun toString(): String {
-        return "class " + (qualifiedName ?: simpleName ?: "<anonymous>")
+        val relativeName = getRelativeName(typeInfo, false)
+        val visibleName = if (relativeName != null) {
+            val packageName = getPackageName(typeInfo, false)!!
+            if (packageName.isEmpty()) relativeName else "$packageName.$relativeName"
+        } else "<anonymous>"
+
+        return "class $visibleName"
     }
 
     internal fun findAssociatedObjectImpl(key: KClassImpl<*>): Any? =
@@ -80,10 +76,10 @@ internal external fun getObjectTypeInfo(obj: Any): NativePtr
 internal external inline fun <reified T : Any> getClassTypeInfo(): NativePtr
 
 @GCUnsafeCall("Kotlin_TypeInfo_getPackageName")
-private external fun getPackageName(typeInfo: NativePtr): String?
+private external fun getPackageName(typeInfo: NativePtr, checkFlags: Boolean): String?
 
 @GCUnsafeCall("Kotlin_TypeInfo_getRelativeName")
-private external fun getRelativeName(typeInfo: NativePtr): String?
+private external fun getRelativeName(typeInfo: NativePtr, checkFlags: Boolean): String?
 
 @GCUnsafeCall("Kotlin_TypeInfo_isInstance")
 private external fun isInstance(obj: Any, typeInfo: NativePtr): Boolean