[runtime][debug] type name inspection

runtime/src/debug/cpp/KDebug.cpp

@@ -19,6 +19,7 @@
 #include <string.h>
 
 #include "KAssert.h"
+#include "KString.h"
 #include "Memory.h"
 #include "Natives.h"
 #include "Porting.h"
@@ -176,6 +177,17 @@ RUNTIME_USED const char* Konan_DebugGetFieldName(KRef obj, int index) {
   return extendedTypeInfo->fieldNames_[index];
 }
 
+RUNTIME_USED const char* Konan_DebugGetTypeName(KRef obj) {
+  if (obj == nullptr)
+    return nullptr;
+
+  auto type_info = obj->type_info();
+  if (type_info == nullptr)
+    return "<unknown>";
+
+  return CreateCStringFromString(type_info->relativeName_);
+}
+
 }  // extern "C"
 
 #endif // !KONAN_NO_DEBUG_API

runtime/src/main/cpp/KDebug.h

@@ -60,6 +60,9 @@ RUNTIME_USED void* Konan_DebugGetFieldAddress(KRef obj, int index);
 // Compute address of field or an array element at the index, or null, if incorrect.
 RUNTIME_USED const char* Konan_DebugGetFieldName(KRef obj, int index);
 
+// Returns name of type.
+RUNTIME_USED const char* Konan_DebugGetTypeName(KRef obj);
+
 #ifdef __cplusplus
 }
 #endif