Extract FreezeHooks and make them testable (#4654)

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanFqNames.kt

@@ -31,4 +31,5 @@ object KonanFqNames {
     val typedIntrinsic = FqName("kotlin.native.internal.TypedIntrinsic")
     val objCMethod = FqName("kotlinx.cinterop.ObjCMethod")
     val hasFinalizer = FqName("kotlin.native.internal.HasFinalizer")
+    val hasFreezeHook = FqName("kotlin.native.internal.HasFreezeHook")
 }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/RTTIGenerator.kt

@@ -75,6 +75,10 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
             result = result or TF_HAS_FINALIZER
         }
 
+        if (irClass.hasAnnotation(KonanFqNames.hasFreezeHook)) {
+            result = result or TF_HAS_FREEZE_HOOK
+        }
+
         return result
     }
 
@@ -638,4 +642,5 @@ private const val TF_OBJC_DYNAMIC = 8
 private const val TF_LEAK_DETECTOR_CANDIDATE = 16
 private const val TF_SUSPEND_FUNCTION = 32
 private const val TF_HAS_FINALIZER = 64
+private const val TF_HAS_FREEZE_HOOK = 128