Individual CPU information not loading on Android

[jdvillal]

Describe the bug
I'm porting an App to Android. I noticed that sys.cpus() functions is returning always an empty vector on Android platform.
sysinfo = "0.29.10"
The code below returns information in Windows, Linux and MacOS, but it returns an empty vector in Android.

let mut sys = System::new_all();
sys.refresh_cpu();
println!("{:?}",sys.cpus());

Calling sys.physical_core_count() works as expected, returning the actual core count. As Android is Linux, I though sys.cpus() should just work as well, but it doesn't. Is this behavior expected?

[GuillaumeGomez]

It's not and I can't test myself on android so I'd be very interested if you could send a fix!

[jdvillal]

Update.

I found that this is not exactly a problem with sysinfo but rather the way it works. Refreshing CPU data depends on reading proc/stat in Linux.

However, according to https://issuetracker.google.com/issues/37140047, /proc/stat leaks side channel information about applications which could allow one application to infer the state of other applications on the device, so read access to proc/stat was removed from API Levels 26 or higher. Hence, when using a sysinfo feature that requires reading proc/stat we got:
Stderr: failed to retrieve CPU information: Os { code: 13, kind: PermissionDeionDenied, message: "Permission denied" }
Even worst, the permission required to get read access:
https://developer.android.com/reference/android/Manifest.permission#READ_LOGS is reserved for system applications only, so third party software cannot use it.

[GuillaumeGomez]

Ah. So I suppose there is nothing that can be done here (except maybe update documentation to mention this).