What are all the situations where the /GS compiler is not applied in VC++

These are the following situations where /GS compiler is not applied.
1) When functions do not contain a buffer
2) When optimizations is not enabled
3) It is obvious when functions are defined to have a variable argument list it cannot create a static cookie.

4) If functions are marked with a naked keyword such as (C++) etc a GS compiler cannot be created.