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## CONTAINER RUNTIME MEETUP #3 working environment | |
$ lsb_release -a | |
No LSB modules are available. | |
Distributor ID: Ubuntu | |
Description: Ubuntu 20.10 | |
Release: 20.10 | |
Codename: groovy | |
$ uname -a | |
Linux ubuntu-groovy 5.8.0-38-generic #43-Ubuntu SMP Tue Jan 12 12:42:13 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux | |
$ runc -v |
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bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_ARRAY, key_size=4, value_size=32, max_entries=1, map_flags=0, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0}, 120) = 4 | |
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=5, insns=0x7ffffd20c790, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0}, 120) = -1 EPERM (Operation not permitted) |
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source "https://rubygems.org" | |
gem "rack" | |
gem "sinatra" | |
# gem "pry" |
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## | |
# This file is owned by Uchio KONDO | |
# esc | |
unbind-key C-b | |
set-option -g prefix C-] | |
bind-key C-] send-prefix | |
# Act like Vim | |
set-window-option -g mode-keys vi |
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from bcc import BPF | |
code = """ | |
#include <linux/elf.h> | |
struct data_t { | |
unsigned char magic[EI_NIDENT]; | |
u64 type; | |
u64 offset; | |
u64 addr; |
mruby3 を試す
- mruby version: c1f5f9986ae4b5085bee6143d378182746462519 (https://github.com/mruby/mruby/commit/c1f5f9986ae4b5085bee6143d378182746462519)
- ビルド設定の構成変更について検証。
- まずはビルド。
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$ ./chkheap | |
PID=7319 | |
Run bpftrace background and hit return: | |
55a46e740000-55a46e741000 r-xp 00000000 08:01 22338 /home/vagrant/chkheap | |
55a46e940000-55a46e941000 r--p 00000000 08:01 22338 /home/vagrant/chkheap | |
55a46e941000-55a46e942000 rw-p 00001000 08:01 22338 /home/vagrant/chkheap | |
55a4705d0000-55a4705f1000 rw-p 00000000 00:00 0 [heap] | |
7f341d659000-7f341d840000 r-xp 00000000 08:01 21679 /lib/x86_64-linux-gnu/libc-2.27.so | |
7f341d840000-7f341da40000 ---p 001e7000 08:01 21679 /lib/x86_64-linux-gnu/libc-2.27.so |
自分がどういうことを考えてクラス設計しているかを整理してみました。同じようなことを大名エンジニアカレッジでも話したのですが、今回はフィヨルドの課題で考えてみました。
たとえば ls コマンドの場合はこういうレイヤがあるんじゃないかなあと考えられます。
- インプットする方法... OSの機能を使ってあるディレクトリのファイルを集めないといけない。その操作をする人が必要そう
- 集まったデータ... ファイルが集まってくる。ファイルには、普通のファイル、ディレクトリの二種類はありそう。
- アウトプット... 表示のフォーマットがいくつかある。一列のやつと、サイズなどを詳細に出すやつ。
- それらをつなぐ... ここに書いていないあふれた仕事をとりあえず押し付ける人がいると便利かな...