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strace C# AOT
Raw
README.md

Summary

$ dotnet --list-sdks
10.0.102

Build and Run. (Native AOT)

dotnet publish -o publish -r linux-x64 -c Release
cp publish/hello_csharp_aot ~/. && cd ~
strace -c ./hello_csharp_aot

How to find your icu versions. You have 74 for following case.

$ ldconfig -p | grep -E 'libicu(uc|i18n)\.so' | head -n 50
        libicuuc.so.74 (libc6,x86-64) => /lib/x86_64-linux-gnu/libicuuc.so.74
        libicui18n.so.74 (libc6,x86-64) => /lib/x86_64-linux-gnu/libicui18n.so.74

Reference

https://dev.classmethod.jp/articles/strace-c-go-rust-python-node-js-hello-world/

Managed C#

https://gist.github.com/guitarrapc/50d30f171ea1af6aa935bd268b954026

Raw
hello_csharp_aot.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PublishSingleFile>true</PublishSingleFile>
<SelfContained>true</SelfContained>
<PublishAot>true</PublishAot>
</PropertyGroup>
</Project>
Raw
Program.cs
Console.WriteLine("Hello, World");
Raw
strace.txt
# syscalls
```shell
$ strace -c ./hello_csharp_aot
Hello, World
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ------------------
33.24 0.001192 9 129 83 openat
14.89 0.000534 8 61 mmap
12.97 0.000465 17 27 mprotect
7.45 0.000267 12 22 munmap
6.53 0.000234 5 44 fstat
5.94 0.000213 4 45 close
4.35 0.000156 9 16 12 newfstatat
3.12 0.000112 2 38 read
2.51 0.000090 5 18 rt_sigaction
2.29 0.000082 13 6 rt_sigprocmask
1.06 0.000038 9 4 ioctl
0.98 0.000035 17 2 write
0.98 0.000035 17 2 clone3
0.70 0.000025 8 3 futex
0.56 0.000020 1 17 madvise
0.47 0.000017 17 1 pipe2
0.31 0.000011 11 1 lseek
0.28 0.000010 3 3 pread64
0.25 0.000009 2 4 brk
0.25 0.000009 3 3 sched_getaffinity
0.22 0.000008 2 3 getpid
0.22 0.000008 8 1 fcntl
0.22 0.000008 8 1 gettid
0.22 0.000008 2 4 prlimit64
0.00 0.000000 0 1 1 access
0.00 0.000000 0 1 execve
0.00 0.000000 0 1 sysinfo
0.00 0.000000 0 2 statfs
0.00 0.000000 0 1 arch_prctl
0.00 0.000000 0 2 getdents64
0.00 0.000000 0 1 set_tid_address
0.00 0.000000 0 1 get_mempolicy
0.00 0.000000 0 1 set_robust_list
0.00 0.000000 0 1 getrandom
0.00 0.000000 0 2 membarrier
0.00 0.000000 0 1 rseq
------ ----------- ----------- --------- --------- ------------------
100.00 0.003586 7 470 96 total
```
## Why so many openat (loader)?
It searches ICU for every version 90 > 89 > 88 ... 75 > 74 (found!), then loader started. Most openat are caused by searching ICU.
```shell
$ strace -f -e trace=openat,newfstatat,access -s 200 ./hello_csharp_aot 2>&1 | head -n 200
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/devices/system/node", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/cpu.max", O_RDONLY) = 3
strace: Process 2653 attached
[pid 2652] openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/memory.max", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/size", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/level", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/size", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/level", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/size", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/level", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/size", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/level", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index4/size", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/proc/meminfo", O_RDONLY) = 3
[pid 2652] openat(AT_FDCWD, "/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v4/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v4/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v3/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v3/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v2/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v2/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/x86_64-linux-gnu/", {st_mode=S_IFDIR|0755, st_size=32768, ...}, 0) = 0
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v4/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v4/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v3/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v3/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v2/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/glibc-hwcaps/x86-64-v2/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/", {st_mode=S_IFDIR|0755, st_size=32768, ...}, 0) = 0
[pid 2652] openat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v4/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v4/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v3/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v3/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v2/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/glibc-hwcaps/x86-64-v2/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/lib/", {st_mode=S_IFDIR|0755, st_size=4096, ...}, 0) = 0
[pid 2652] openat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v4/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v4/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v3/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v3/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v2/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/glibc-hwcaps/x86-64-v2/", 0x7ffd104b0680, 0) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.90", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] newfstatat(AT_FDCWD, "/usr/lib/", {st_mode=S_IFDIR|0755, st_size=4096, ...}, 0) = 0
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.89", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.89", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.89", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.89", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.88", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.88", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.88", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.88", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.87", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.87", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.87", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.87", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.86", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.86", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.86", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.86", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.85", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.85", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.85", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.85", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.84", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.84", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.84", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.84", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.83", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.83", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.83", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.83", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.82", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.82", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.82", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.82", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.81", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.81", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.81", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.81", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.80", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.80", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.80", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.80", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.79", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.79", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.79", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.79", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.78", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.78", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.78", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.78", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.77", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.77", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.77", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.77", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.76", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.76", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.76", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.76", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.75", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libicuuc.so.75", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/libicuuc.so.75", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/lib/libicuuc.so.75", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicudata.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicui18n.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 2652] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_CLOEXEC) = 4
strace: Process 2654 attached
[pid 2652] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/etc/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/lib/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 2652] openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = 7
Hello, World
[pid 2654] +++ exited with 0 +++
[pid 2653] +++ exited with 0 +++
+++ exited with 0 +++
```
# ldd
How many dependencies?
```shell
$ ldd ./hello_csharp_aot
linux-vdso.so.1 (0x00007ffef3d88000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x000076084a315000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x000076084a000000)
/lib64/ld-linux-x86-64.so.2 (0x000076084a568000)
```
Raw
strace_with_specify_icu.txt
# syscalls
Specifing ICU version significantly reduce openat while uging ICU.
```shell
$ DOTNET_ICU_VERSION_OVERRIDE=74 strace -c ./hello_csharp_aot
Hello, World
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ------------------
16.53 0.000733 19 38 read
15.33 0.000680 18 37 7 openat
13.71 0.000608 13 45 mmap
8.00 0.000355 12 29 close
8.00 0.000355 13 27 mprotect
6.90 0.000306 10 28 fstat
5.01 0.000222 222 1 execve
4.55 0.000202 11 17 madvise
4.24 0.000188 31 6 rt_sigprocmask
3.38 0.000150 8 18 rt_sigaction
2.19 0.000097 16 6 munmap
2.01 0.000089 44 2 clone3
0.90 0.000040 10 4 brk
0.90 0.000040 10 4 ioctl
0.83 0.000037 18 2 write
0.74 0.000033 11 3 getpid
0.72 0.000032 8 4 prlimit64
0.68 0.000030 10 3 sched_getaffinity
0.61 0.000027 9 3 pread64
0.61 0.000027 9 3 futex
0.56 0.000025 12 2 statfs
0.54 0.000024 12 2 getdents64
0.36 0.000016 16 1 pipe2
0.36 0.000016 8 2 membarrier
0.32 0.000014 14 1 sysinfo
0.23 0.000010 10 1 lseek
0.23 0.000010 10 1 1 access
0.23 0.000010 10 1 arch_prctl
0.20 0.000009 9 1 fcntl
0.20 0.000009 9 1 get_mempolicy
0.20 0.000009 9 1 getrandom
0.18 0.000008 8 1 gettid
0.18 0.000008 8 1 set_tid_address
0.18 0.000008 8 1 set_robust_list
0.18 0.000008 8 1 rseq
------ ----------- ----------- --------- --------- ------------------
100.00 0.004435 14 298 8 total
```
## Why so many openat (loader)?
Specifying ICU version stop searching each ICU version.
```shell
$ DOTNET_ICU_VERSION_OVERRIDE=74 strace -f -e trace=openat,newfstatat,access -s 200 ./hello_csharp_ao
t 2>&1 | head -n 200
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/devices/system/node", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/cpu.max", O_RDONLY) = 3
strace: Process 3655 attached
[pid 3654] openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/memory.max", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/size", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/level", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/size", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/level", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/size", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/level", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/size", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/level", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index4/size", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/proc/meminfo", O_RDONLY) = 3
[pid 3654] openat(AT_FDCWD, "/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
[pid 3654] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicuuc.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicudata.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libicui18n.so.74", O_RDONLY|O_CLOEXEC) = 4
[pid 3654] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_CLOEXEC) = 4
strace: Process 3656 attached
[pid 3654] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/etc/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/etc/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/lib/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/lib/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3654] openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = 7
Hello, World
[pid 3656] +++ exited with 0 +++
[pid 3655] +++ exited with 0 +++
+++ exited with 0 +++
```
# ldd
How many dependencies?
```shell
$ DOTNET_ICU_VERSION_OVERRIDE=74 ldd ./hello_csharp_aot
linux-vdso.so.1 (0x00007ffdef9ea000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x0000734567c61000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x0000734567a00000)
/lib64/ld-linux-x86-64.so.2 (0x0000734567eb4000)
```
Raw
strace_without_icu.txt
# syscalls
Without ICU significantly reduce openat.
```
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 strace -c ./hello_csharp_aot
Hello, World
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ------------------
18.29 0.000209 9 22 mprotect
15.49 0.000177 5 30 7 openat
12.95 0.000148 8 17 madvise
9.19 0.000105 3 33 read
7.96 0.000091 5 18 rt_sigaction
5.51 0.000063 2 22 close
5.51 0.000063 3 20 mmap
4.02 0.000046 23 2 clone3
3.67 0.000042 2 21 fstat
3.32 0.000038 9 4 ioctl
2.97 0.000034 17 2 write
2.80 0.000032 5 6 rt_sigprocmask
1.40 0.000016 4 4 prlimit64
1.31 0.000015 15 1 pipe2
0.96 0.000011 3 3 munmap
0.87 0.000010 3 3 pread64
0.79 0.000009 9 1 lseek
0.79 0.000009 9 1 fcntl
0.79 0.000009 3 3 sched_getaffinity
0.70 0.000008 2 3 getpid
0.70 0.000008 8 1 gettid
0.00 0.000000 0 3 brk
0.00 0.000000 0 1 1 access
0.00 0.000000 0 1 execve
0.00 0.000000 0 1 sysinfo
0.00 0.000000 0 2 statfs
0.00 0.000000 0 1 arch_prctl
0.00 0.000000 0 2 getdents64
0.00 0.000000 0 1 set_tid_address
0.00 0.000000 0 1 get_mempolicy
0.00 0.000000 0 1 set_robust_list
0.00 0.000000 0 1 getrandom
0.00 0.000000 0 2 membarrier
0.00 0.000000 0 1 rseq
------ ----------- ----------- --------- --------- ------------------
100.00 0.001143 4 235 8 total
```
## Why so many openat (loader)?
Disabling ICU stop searching icu.
```shell
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 strace -f -e trace=openat,newfstatat,access -s 200 ./hello_csharp_aot 2>&1 | head -n 200
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/devices/system/node", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 3
openat(AT_FDCWD, "/proc/self/cgroup", O_RDONLY) = 3
openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/cpu.max", O_RDONLY) = 3
strace: Process 3120 attached
[pid 3119] openat(AT_FDCWD, "/sys/fs/cgroup/init.scope/memory.max", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/size", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index0/level", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/size", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index1/level", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/size", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index2/level", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/size", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index3/level", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/sys/devices/system/cpu/cpu0/cache/index4/size", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/proc/meminfo", O_RDONLY) = 3
[pid 3119] openat(AT_FDCWD, "/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
[pid 3119] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_CLOEXEC) = 4
strace: Process 3121 attached
[pid 3119] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/home/guitarrapc/.terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/etc/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/etc/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/lib/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/lib/terminfo/78/xterm-256color", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3119] openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY|O_CLOEXEC) = 7
Hello, World
[pid 3121] +++ exited with 0 +++
[pid 3120] +++ exited with 0 +++
+++ exited with 0 +++
```
# ldd
How many dependencies?
```shell
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 ldd ./hello_csharp_aot
linux-vdso.so.1 (0x00007ffd7d5ce000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007caa1f491000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007caa1f200000)
/lib64/ld-linux-x86-64.so.2 (0x00007caa1f6e4000)
```
Raw
why_write_2.txt
.NET Runtime Console pass `DECCKM: cursor keys mode` to PTY (terminal), then write `Hello, World`.
```shell
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 strace -f -ttt -e write ./hello_csharp_aot
strace: Process 3615 attached
strace: Process 3616 attached
[pid 3614] 1770615973.110877 write(1, "\33[?1h\33=", 7) = 7
[pid 3614] 1770615973.111343 write(3, "Hello, World\n", 13Hello, World
) = 13
[pid 3616] 1770615973.111537 +++ exited with 0 +++
[pid 3615] 1770615973.111556 +++ exited with 0 +++
1770615973.111723 +++ exited with 0 +++
```
```shell
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 strace -f -ttt -e trace=write,writev -s 200 -yy -xx ./hello_csharp_aot
strace: Process 3508 attached
strace: Process 3509 attached
[pid 3507] 1770614731.570027 write(1<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>, "\x1b\x5b\x3f\x31\x68\x1b\x3d", 7) = 7
[pid 3507] 1770614731.570796 write(3<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>, "\x48\x65\x6c\x6c\x6f\x2c\x20\x57\x6f\x72\x6c\x64\x0a", 13Hello, World
) = 13
[pid 3509] 1770614731.571043 +++ exited with 0 +++
[pid 3508] 1770614731.571062 +++ exited with 0 +++
1770614731.571251 +++ exited with 0 +++
```
## 1st write
`\x1b` = ESC
`\x1b\x5b\x3f\x31\x68` = `ESC [ ? 1 h` = DEC Private Mode Set 1（DECCKM: cursor keys mode）
`\x1b\x3d` = `ESC` = = DECKPAM（Keypad Application Mode）
```
write(1</dev/pts/4>, "\x1b\x5b\x3f\x31\x68\x1b\x3d", 7) = 7
```
## 2nd write
Characters and NewLine at once.
`fd=3` = `/dev/pts/4` = not using `stdout(1)` directly.
```
write(3</dev/pts/4>, "Hello, World\n", 13) = 13
```
## Why fd=3?
fd=3 is clone of `stdout(1)` (with CLOEXEC)
```
$ DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 strace -f -ttt -e trace=dup,dup2,dup3,fcntl,openat,close,wr
ite -s 200 -yy -xx ./hello_csharp_aot
1770615680.715285 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x65\x74\x63\x2f\x6c\x64\x2e\x73\x6f\x2e\x63\x61\x63\x68\x65", O_RDONLY|O_CLOEXEC) = 3<\x2f\x65\x74\x63\x2f\x6c\x64\x2e\x73\x6f\x2e\x63\x61\x63\x68\x65>
1770615680.715612 close(3<\x2f\x65\x74\x63\x2f\x6c\x64\x2e\x73\x6f\x2e\x63\x61\x63\x68\x65>) = 0
1770615680.715714 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x6d\x2e\x73\x6f\x2e\x36", O_RDONLY|O_CLOEXEC) = 3<\x2f\x75\x73\x72\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x6d\x2e\x73\x6f\x2e\x36>
1770615680.716185 close(3<\x2f\x75\x73\x72\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x6d\x2e\x73\x6f\x2e\x36>) = 0
1770615680.716287 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x63\x2e\x73\x6f\x2e\x36", O_RDONLY|O_CLOEXEC) = 3<\x2f\x75\x73\x72\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x63\x2e\x73\x6f\x2e\x36>
1770615680.716865 close(3<\x2f\x75\x73\x72\x2f\x6c\x69\x62\x2f\x78\x38\x36\x5f\x36\x34\x2d\x6c\x69\x6e\x75\x78\x2d\x67\x6e\x75\x2f\x6c\x69\x62\x63\x2e\x73\x6f\x2e\x36>) = 0
1770615680.717960 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x6f\x6e\x6c\x69\x6e\x65", O_RDONLY|O_CLOEXEC) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x6f\x6e\x6c\x69\x6e\x65>
1770615680.718141 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x6f\x6e\x6c\x69\x6e\x65>) = 0
1770615680.718583 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x73\x65\x6c\x66\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f", O_RDONLY) = 3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f>
1770615680.719163 close(3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f>) = 0
1770615680.719318 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x73\x65\x6c\x66\x2f\x63\x67\x72\x6f\x75\x70", O_RDONLY) = 3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x63\x67\x72\x6f\x75\x70>
1770615680.719563 close(3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x63\x67\x72\x6f\x75\x70>) = 0
1770615680.719814 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x6e\x6f\x64\x65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x6e\x6f\x64\x65>
1770615680.720089 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x6e\x6f\x64\x65>) = 0
1770615680.720291 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x73\x65\x6c\x66\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f", O_RDONLY) = 3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f>
1770615680.720806 close(3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x6f\x75\x6e\x74\x69\x6e\x66\x6f>) = 0
1770615680.720897 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x73\x65\x6c\x66\x2f\x63\x67\x72\x6f\x75\x70", O_RDONLY) = 3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x63\x67\x72\x6f\x75\x70>
1770615680.721113 close(3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x63\x67\x72\x6f\x75\x70>) = 0
1770615680.721321 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x63\x70\x75\x2e\x6d\x61\x78", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x63\x70\x75\x2e\x6d\x61\x78>
1770615680.721556 close(3<\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x63\x70\x75\x2e\x6d\x61\x78>) = 0
strace: Process 3593 attached
[pid 3592] 1770615680.722200 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x6d\x65\x6d\x6f\x72\x79\x2e\x6d\x61\x78", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x6d\x65\x6d\x6f\x72\x79\x2e\x6d\x61\x78>
[pid 3592] 1770615680.722413 close(3<\x2f\x73\x79\x73\x2f\x66\x73\x2f\x63\x67\x72\x6f\x75\x70\x2f\x69\x6e\x69\x74\x2e\x73\x63\x6f\x70\x65\x2f\x6d\x65\x6d\x6f\x72\x79\x2e\x6d\x61\x78>) = 0
[pid 3592] 1770615680.722740 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x73\x69\x7a\x65", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x73\x69\x7a\x65>
[pid 3592] 1770615680.722968 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x73\x69\x7a\x65>) = 0
[pid 3592] 1770615680.723063 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x6c\x65\x76\x65\x6c", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x6c\x65\x76\x65\x6c>
[pid 3592] 1770615680.723301 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x30\x2f\x6c\x65\x76\x65\x6c>) = 0
[pid 3592] 1770615680.723464 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x73\x69\x7a\x65", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x73\x69\x7a\x65>
[pid 3592] 1770615680.723818 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x73\x69\x7a\x65>) = 0
[pid 3592] 1770615680.723915 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x6c\x65\x76\x65\x6c", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x6c\x65\x76\x65\x6c>
[pid 3592] 1770615680.724152 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x31\x2f\x6c\x65\x76\x65\x6c>) = 0
[pid 3592] 1770615680.724245 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x73\x69\x7a\x65", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x73\x69\x7a\x65>
[pid 3592] 1770615680.724473 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x73\x69\x7a\x65>) = 0
[pid 3592] 1770615680.724586 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x6c\x65\x76\x65\x6c", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x6c\x65\x76\x65\x6c>
[pid 3592] 1770615680.724837 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x32\x2f\x6c\x65\x76\x65\x6c>) = 0
[pid 3592] 1770615680.724954 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x73\x69\x7a\x65", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x73\x69\x7a\x65>
[pid 3592] 1770615680.725215 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x73\x69\x7a\x65>) = 0
[pid 3592] 1770615680.725312 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x6c\x65\x76\x65\x6c", O_RDONLY) = 3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x6c\x65\x76\x65\x6c>
[pid 3592] 1770615680.725588 close(3<\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x33\x2f\x6c\x65\x76\x65\x6c>) = 0
[pid 3592] 1770615680.725714 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x73\x79\x73\x2f\x64\x65\x76\x69\x63\x65\x73\x2f\x73\x79\x73\x74\x65\x6d\x2f\x63\x70\x75\x2f\x63\x70\x75\x30\x2f\x63\x61\x63\x68\x65\x2f\x69\x6e\x64\x65\x78\x34\x2f\x73\x69\x7a\x65", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.726598 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x6d\x65\x6d\x69\x6e\x66\x6f", O_RDONLY) = 3<\x2f\x70\x72\x6f\x63\x2f\x6d\x65\x6d\x69\x6e\x66\x6f>
[pid 3592] 1770615680.726825 close(3<\x2f\x70\x72\x6f\x63\x2f\x6d\x65\x6d\x69\x6e\x66\x6f>) = 0
[pid 3592] 1770615680.728136 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x70\x72\x6f\x63\x2f\x73\x65\x6c\x66\x2f\x6d\x61\x70\x73", O_RDONLY|O_CLOEXEC) = 3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x61\x70\x73>
[pid 3592] 1770615680.728578 close(3<\x2f\x70\x72\x6f\x63\x2f\x33\x35\x39\x32\x2f\x6d\x61\x70\x73>) = 0
[pid 3592] 1770615680.729116 fcntl(1<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>, F_DUPFD_CLOEXEC, 0) = 3<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>
[pid 3592] 1770615680.729308 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x64\x65\x76\x2f\x75\x72\x61\x6e\x64\x6f\x6d", O_RDONLY|O_CLOEXEC) = 4<\x2f\x64\x65\x76\x2f\x75\x72\x61\x6e\x64\x6f\x6d<char 1:9>>
strace: Process 3594 attached
[pid 3592] 1770615680.730345 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63\x2f\x2e\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730449 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63\x2f\x2e\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x37\x38\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730545 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x65\x74\x63\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730625 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x65\x74\x63\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x37\x38\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730723 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x6c\x69\x62\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730832 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x6c\x69\x62\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x37\x38\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 3592] 1770615680.730932 openat(AT_FDCWD<\x2f\x68\x6f\x6d\x65\x2f\x67\x75\x69\x74\x61\x72\x72\x61\x70\x63>, "\x2f\x75\x73\x72\x2f\x73\x68\x61\x72\x65\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72", O_RDONLY|O_CLOEXEC) = 7<\x2f\x75\x73\x72\x2f\x73\x68\x61\x72\x65\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72>
[pid 3592] 1770615680.731219 close(7<\x2f\x75\x73\x72\x2f\x73\x68\x61\x72\x65\x2f\x74\x65\x72\x6d\x69\x6e\x66\x6f\x2f\x78\x2f\x78\x74\x65\x72\x6d\x2d\x32\x35\x36\x63\x6f\x6c\x6f\x72>) = 0
[pid 3592] 1770615680.731326 write(1<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>, "\x1b\x5b\x3f\x31\x68\x1b\x3d", 7) = 7
[pid 3592] 1770615680.731734 write(3<\x2f\x64\x65\x76\x2f\x70\x74\x73\x2f\x34<char 136:4>>, "\x48\x65\x6c\x6c\x6f\x2c\x20\x57\x6f\x72\x6c\x64\x0a", 13Hello, World
) = 13
[pid 3594] 1770615680.731938 +++ exited with 0 +++
[pid 3593] 1770615680.731956 +++ exited with 0 +++
1770615680.732152 +++ exited with 0 +++
```
dotnet indicate cloning `stdout` FD=1 to `FD=3` by `F_DUPFD_CLOEXEC`. This is aim to keep stdout safe handle for console output. stdout(1) can be modified by `close(1)`, `dup2` or redirected by application.
```
fcntl(1</dev/pts/4>, F_DUPFD_CLOEXEC, 0) = 3</dev/pts/4>
```
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