Use error_handler if getSymbol encountered error and returns nullptr

Author: oleksandr-pavlyk

libsyclinterface/helper/include/dpctl_dynamic_lib_helper.h

@@ -39,6 +39,7 @@
 #endif // __linux__
 
 #include <cstdint>
+#include "dpctl_error_handlers.h"
 
 namespace dpctl
 {
@@ -76,12 +77,23 @@ class DynamicLibHelper final
         char *error = dlerror();
 
         if (nullptr != error) {
+            error_handler(
+                "Could not retrieve symbol "
+                + std::string(symName)
+                + ". Error encountered: "
+                + std::string(error),  __FILE__, __func__, __LINE__
+            );
             return nullptr;
         }
 #elif defined(_WIN32) || defined(_WIN64)
         void *sym = (void *)GetProcAddress((HMODULE)_handle, symName);
 
         if (nullptr == sym) {
+            error_handler(
+                "Could not retrieve symbol "
+                + std::string(symName)
+                + ".",  __FILE__, __func__, __LINE__
+            );
             return nullptr;
         }
 #endif