Known Issues¶

OSError: Failed to set RWX¶

The Python script uses a technique to execute code from the heap. On certain systems, e.g. SELinux, there may be policies to prevent this. Executing the script on these systems may result in an error message similar to the following:

OSError: Failed to set RWX 

If this occurs, you can try executing the script as a root or temporarily disabling heap execution prevention, e.g. on SELinux:

$ sudo setsebool selinuxuser_execheap on

Virtual Machines¶

Running the script on a virtual machine may provide unreliable results. Some hypervisors are aware of which guest OS runs on the virtual machine, and may disable CPU features which that OS does not need.