adds HostInfo.NativeArchitecture

[intxgo]

Adds NativeArchitecture to HostInfo to empower applications to detect if they are run in emulation.

Modern desktop operating systems ported to the ARM architecture include capabilities to run x86 applications via binary translation to ease the technological transition. This is usually fine, except for applications that rely on a specific native platform, such as for installing native drivers.

Testing

Tested in the following configurations:

ARM64 CPU

macOS

• native binary

GOARCH arm64
Architecture arm64
NativeArchitecture arm64

• AMD64 binary

GOARCH amd64
Architecture x64_64
NativeArchitecture arm64

Linux

• native binary

GOARCH arm64
Architecture aarch64
NativeArchitecture aarch64

• AMD64 binary

GOARCH amd64
Architecture x64_64
NativeArchitecture aarch64

Windows

• native binary

N/A as Go doesn't support GOOS=Windows GOARCH=arm64

• AMD64 binary

GOARCH amd64
Architecture x64_64
NativeArchitecture arm64

AMD64 CPU

macOS

• native binary

GOARCH amd64
Architecture x64_64
NativeArchitecture x64_64

• ARM64 binary

N/A as Rosetta 2 is not supported on Intel platform

Linux

• native binary

GOARCH amd64
Architecture x64_64
NativeArchitecture x64_64

• ARM64 binary

GOARCH amd64
Architecture aarch64
NativeArchitecture x64_64

Windows

• native binary

GOARCH amd64
Architecture x64_64
NativeArchitecture x64_64

• ARM64 binary

N/A as Go doesn't support GOOS=Windows GOARCH=arm64

[andrewkroh]

It's cool that we can detect the presence of Rosetta. I had no idea about sysctl.proc_translated.

[fearful-symmetry]

So, I just commented for now, but I'm a little worried that Architecture and NativeArchitecture might be functionally the same on linux.

[fearful-symmetry]

Do we need to close this handle after we're done?

[intxgo]

no, as the explicit comment says. If you're not convinced check the manual

[fearful-symmetry]

Alright, we've had issues with leaving handles open, so I'm a tad paranoid...

[fearful-symmetry]

Code looks fine, but I'm personally curious if we have a way to test the behavior of this under linux? On Darwin we have Rosetta, but is there some similar linux utility we're hoping to support?

[intxgo]

Code looks fine, but I'm personally curious if we have a way to test the behavior of this under linux? On Darwin we have Rosetta, but is there some similar linux utility we're hoping to support?

Linux multiarch, that's how we run x86-64 tools in linux on Apple macbooks, etc

It's quite the contrary, we want to fail gracefully in products which cannot be run in emulation instead of giving the false impression that something is wrong with them.