Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
How is magic formed
Search
Rin Raeuber
July 03, 2014
Programming
0
860
How is magic formed
Short excursion into Ruby Internals, Ruby Usergroup Berlin, June 3rd 2014
Rin Raeuber
July 03, 2014
Tweet
Share
More Decks by Rin Raeuber
See All by Rin Raeuber
Das Internet of Things mit dem ESP2866
rin
0
170
Let's create a game with Ruby
rin
1
100
Hallo, wir sind die Cyborgs: Implantate, Body-Hacks und Rock ‘n Roll
rin
1
94
Let's go to Mars #rp14
rin
0
250
Angular Directives For The Rest Of Us
rin
1
320
Other Decks in Programming
See All in Programming
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
140
ISUCON研修おかわり会 講義スライド
arfes0e2b3c
1
450
明示と暗黙 ー PHPとGoの インターフェイスの違いを知る
shimabox
2
520
GitHub Copilot and GitHub Codespaces Hands-on
ymd65536
2
150
なぜ適用するか、移行して理解するClean Architecture 〜構造を超えて設計を継承する〜 / Why Apply, Migrate and Understand Clean Architecture - Inherit Design Beyond Structure
seike460
PRO
3
780
システム成長を止めない!本番無停止テーブル移行の全貌
sakawe_ee
1
210
GPUを計算資源として使おう!
primenumber
1
120
Quand Symfony, ApiPlatform, OpenAI et LangChain s'allient pour exploiter vos PDF : de la théorie à la production…
ahmedbhs123
0
200
VS Code Update for GitHub Copilot
74th
2
650
Porting a visionOS App to Android XR
akkeylab
0
480
生成AI時代のコンポーネントライブラリの作り方
touyou
1
230
イベントストーミング図からコードへの変換手順 / Procedure for Converting Event Storming Diagrams to Code
nrslib
2
850
Featured
See All Featured
Thoughts on Productivity
jonyablonski
69
4.7k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
10
960
Documentation Writing (for coders)
carmenintech
72
4.9k
Side Projects
sachag
455
42k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
54k
The World Runs on Bad Software
bkeepers
PRO
69
11k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
Java REST API Framework Comparison - PWX 2021
mraible
31
8.7k
Build The Right Thing And Hit Your Dates
maggiecrowley
36
2.8k
Typedesign – Prime Four
hannesfritz
42
2.7k
[RailsConf 2023] Rails as a piece of cake
palkan
55
5.7k
Automating Front-end Workflow
addyosmani
1370
200k
Transcript
How is ! magic ! formed
Rin! @rinpaku @bitcrowd
None
WHY?
TIL: There’s bacon in! the Ruby source code
What happens when Ruby runs my code?! ! What is
an Object?
What happens ! when Ruby ! runs my code?
Ruby code 9.times do puts "Ente" end
Tokens 9 . t i m e s …
9 . times do puts "" Tokens 9 . t
i m e s … integer identifier identifier period keyword strin
Syntax Tree do_block period method_add_block integer! 9 identifier! times call
command identifier! puts …
YARV instructions “Yet Another Ruby Virtual Machine” == catch table
| catch type: break st: 0002 ed: 0006 sp: 0000 cont: 0006 |-------------------------------------------------------------- 0000 trace 1 0002 putobject 9 0004 send <callinfo!mid:times, argc:0, block:block 0006 leave == disasm: <RubyVM::InstructionSequence:block in <compiled>@<co == catch table | catch type: redo st: 0000 ed: 0009 sp: 0000 cont: 0000 | catch type: next st: 0000 ed: 0009 sp: 0000 cont: 0009 |-------------------------------------------------------------- 0000 trace 256 0002 trace 1 0004 putself 0005 putstring "Ente"
I MIGHT! HAVE MADE THIS ALL UP
Tokenizing Ripper.lex(your_code)
parse.c
with Ripper: Ripper.sexp(your_code) ! Parsing
with Ripper: Ripper.sexp(your_code) parser debug information: ruby -y example.rb Parsing
RubyVM::InstructionSequence. compile(code).disasm Compiling
What ! is an! Object?
struct meetup { char title[120]; time_t starts_at; bool has_talks; };
Structs
union location { char address[120]; struct position { int latitude;
int longitude; } }; Union
struct meetup { char title[120]; time_t starts_at; bool has_talks; union
{ char address[120]; struct position { int latitude; int longitude; } } };
Let’s look at some source code
RObject struct RObject { struct RBasic basic; … };
RBasic struct RBasic { VALUE flags; const VALUE klass; };
RObject struct RObject { struct RBasic basic; struct { long
numiv; VALUE *ivptr; struct st_table *iv_index_tbl; } heap; }; simplified
RObject struct RObject { struct RBasic basic; union { struct
{ long numiv; VALUE *ivptr; struct st_table *iv_index_tbl; } heap; VALUE ary[ROBJECT_EMBED_LEN_MAX]; } as; };
RFloat struct RFloat { struct RBasic basic; double float_value; };
- Reading C is not that bad.* *(If you
hate it, you can still look at the Standard Library or Rubinius.)! ! - Check out the Ruby source code and give a talk about it. ;) Things to take home
WAIT! Where’s the bacon?
Never create Ruby Strings longer than 23 characters ! Ruby
under a microscope (the book) ! The Ruby Hacking Guide (Warning: Ruby 1.7.3!) ! A Tour of the Ruby MRI Source Code with Pat Shaughnessy Some Links