src/share/vm/prims/jvmtiExport.cpp

*** 2380,2389 ****
--- 2380,2390 ----
      if (on_attach_entry == NULL) {
        // Agent_OnAttach missing - unload library
        if (!agent_lib->is_static_lib()) {
          os::dll_unload(library);
        }
+       st->print_cr("Could not find entry point in %s\n", agent_lib->name());
        delete agent_lib;
      } else {
        // Invoke the Agent_OnAttach function
        JavaThread* THREAD = JavaThread::current();
        {
*** 2410,2419 ****
--- 2411,2425 ----
        // Agent_OnAttach executed so completion status is JNI_OK
        st->print_cr("%d", result);
        result = JNI_OK;
      }
    }
+ 
+   if ((result != JNI_OK) && (*ebuf != '0')) {
+     st->print_cr("%s\n", ebuf);
+   }
+ 
    return result;
  }
  
  #endif // INCLUDE_SERVICES
  ////////////////////////////////////////////////////////////////////////////////////////////////