[Bug] SIGILL on linux docker container

[kawakami-k]

#93 (review)

Because linux docker container has no
/sys/devices/system/cpu/cpu0/regs/identification/midr_el1
file, capability detection fails.

[kawakami-k]

@ilya-lavrenov

Could you tell me docker version and host OS version you use?
I can't reproduce your error on my environment (AWS Graviton3).

# Host
% docker --version
Docker version 24.0.6, build ed223bc

% cat /etc/os-release| grep PRETTY_NAME
PRETTY_NAME="Ubuntu 22.04.2 LTS"

% cat /sys/devices/system/cpu/cpu0/regs/identification/midr_el1
0x00000000411fd401

# Docker container
% docker run -it --rm ubuntu:20.04

# cat /etc/os-release | grep PRETTY_NAME
PRETTY_NAME="Ubuntu 20.04.6 LTS"

# cat /sys/devices/system/cpu/cpu0/regs/identification/midr_el1
0x00000000411fd401

[ilya-lavrenov]

I used Apple M2 macOS14 with ubuntu 20.04 docker image.

[kawakami-k]

At this time, it may be difficult to get CPU capability correctly if the host OS and container OS are different. I wish I could find a similar example in other libraries which deals this issue.

[malfet]

Might be fixed by #96

[ilya-lavrenov]

Yes, it fixes the issue
Thanks @malfet and @kawakami-k