None, including C, which makes it nothing special. Any compiled language can call into Assembly.
The phones I know as having taken over the world run on C++, Objective-C, Swift, Java, with very little C still left around, and with its area being reduced with each OS release.
As for data centers, there is a certain irony that on Azure those FOSS run on top of Hyper-V, written in C++, on Google Cloud run on top of gVisor written in Go, on Amazon on top of Firecracker written in Rust, and on ChromeOS containers written in a mix of Go/Rust.
Hyper-V runs as a Windows Server role. Windows kernel is C, and assembly
gVisor runs on Linux -> C, assembly
Firecracker runs on KVM, which runs on Linux -> C, assembly
In every single thing you have listed, the closest thing to the "bare metal" is C, and assembly. THAT's what makes C special. Its level of adoption, ubiquity and accessibility. Not its spectacular lack of security risks.
Anyway, you have come a very long way from where the parent poster started which was:
Most of the stuff people think of as being the "metal" in
C are, in many cases, virtual abstractions created by the
operating system.
To which I merely pointed out, on the other side of the interface layer is, most commonly C. And assembly.
Operating Systems design has to and is obviously evolving away from this. I disagree that we have reached "peak C" and that is going to decline before it gets bigger.
Unfortunately pjmlp many of the conversations we have start this way, and devolve into this. I don't think I'm going to bother again. I think one (or both) of us will just have to agree to disagree. Have a nice day.
> None, including C, which makes it nothing special. Any compiled language can call into Assembly.
I wish you joy and entertainment interfacing your managed data structures with assembly code.
Yesterday I was forced to look into COM for the first time. There was some kind of callback that I was interested in, and it had basically two arrays as arguments, only in a super abstract from. I'm not lying, it was 30 lines of code before the function could actually access the elements in the arrays (with special "safe" function calls to get/set data).
Of course, that stupid callback had to be wrapped as a method in a class, and had to be statically declared as a callback with a special macro that does member pointer hackery, and that has to be wrapped in some more BEGIN_MAP/END_MAP (or so) macros. Oh yeah, and don't forget to list these declarations in the right order.
Thanks, but that's not why I wanted to become a programmer.
The phones I know as having taken over the world run on C++, Objective-C, Swift, Java, with very little C still left around, and with its area being reduced with each OS release.
As for data centers, there is a certain irony that on Azure those FOSS run on top of Hyper-V, written in C++, on Google Cloud run on top of gVisor written in Go, on Amazon on top of Firecracker written in Rust, and on ChromeOS containers written in a mix of Go/Rust.