Symbol with suffix _exec_mode

Hi, I have questions regarding symbols with suffix _exec_mode. 1) Are symbols with suffix _exec_mode always generated? If not, in which condition are they generated? 2) I call cuModuleGetGlobal() for symbols with suffix _exec_mode. cuModuleGetGlobal() will fail if the symbol specified is not found. Although my code checks the return code from cuModuleGetGlobal() to determine whether it was successful and handles it accordingly, cuda-memcheck reports there were errors calling cuModuleGetGlobal(). Is there a way in which we can check if an _exec_mode symbol is available and then call cuModuleGetGlobal() so that there won’t be any errors from cuda-memcheck? Thanks in advance!