RubyVM を PHP で実装する 〜Hello World を出力するまで〜

PHP Conference 2023
English Title: How to implement RubyVM written in PHP - Until to output Hello World -

Transcript

1. Ί΋Γʔ RubyVM Λ PHP Ͱ࣮૷͢Δ
 ʙHello World Λग़ྗ͢Δ·Ͱʙ PHP ΧϯϑΝϨϯε 2023 
2. Ί΋Γʔ m3m0r7 ෳ਺ͷελʔτΞοϓ΍্৔اۀͰΤϯδ χΞɼEMɼTLɼࣥߦ໾һ CTO ͷܦݧΛܦ ΔɻRuby on Rails ΍ Go Λ࢖༻͍ͯ͠Δ גࣜձࣾΤϯϖΠ΁ 2023 ೥ 7 ݄ʹΤϯδ χΞͱͯ͠δϣΠϯɻ2023 ೥ 10 ݄͔Β EM ͱͯ͠ಇ͍͍ͯ·͢ɻ  memory1994 m3m0r7
3. 
4.  աڈʹ JVM (Java Virtual Machine) Λ PHP Ͱ࣮૷ͨ͠಺༰Ͱొஃ͓ͯ͠Γ·͢ ※ݱࡏࢲ͸ BASE גࣜձࣾΛୀ৬͓ͯ͠Γɼ
 ࢿྉ͸౰࣌ͷ΋ͷΛҾ༻͓ͯ͠Γ·͢ɻ ※ݱࡏࢲ͸ גࣜձࣾ GameWith Λୀ৬͓ͯ͠Γɼ
 ࢿྉ͸౰࣌ͷ΋ͷΛҾ༻͓ͯ͠Γ·͢ɻ
5.  ࢲࣗ਎ɼPHP Λච಄ʹ Go ΍ TypeScript ͳͲ ༷ʑͳݴޠΛֶश͖ͯ͠·ͨ͠
6.  ࣍ୈʹ৽͍͠ݴޠΛ "ී௨ʹ" ֶͿʹ͸
 ܹ͕ࢗ଍Γͳ͘ͳ͖ͬͯ·ͨ͠
7.  Ruby ΋ྫ֎Ͱ͸͋Γ·ͤΜ
8.  ֶशํ๏΋͋Δఔ౓ࣗ෼ͷதͰཱ֬Ͱ͖͍ͯΔ ͷͰϞνϕʔγϣϯ΋ͳ͔ͳ্͔͕Γ·ͤΜ
9.  Ϟνϕʔγϣϯ্͕͕Βͳ͍ͷͰͦͷݴޠͷ
 ؾ࣋ͪΛཧղ͢ΔͳΜͯ΋ͬͯͷ΄͔Ͱ͢
10.  ͦ͜Ͱߟ͑·ͨ͠
11.  Ͳ͏΍ͬͨΒܹࢗυϦϒϯʹݴޠΛֶ΂Δͷ͔
12.  Ͳ͏΍ͬͨΒؾ࣋ͪΛཧղͰ͖Δͷ͔
13.  ʮͦ͏ͩ VM Λ࡞Ζ͏ʯ ʮVM Λ࡞Ε͹ؾ࣋ͪΛཧղͰ͖Δ͸ͣʯ
14.  ࢲͷఱ࢖͕ͦ͏͞͞΍͘ͷͰ͢
15.  ΋͏ී௨ʹ͸໭Ε·ͤΜ
16. VM (Virtual Machine) ʹ͍ͭͯ RubyVM ͷ͘͠Έ RubyVM ͷ࡞Γํ DEMO (͕࣌ؒ͋Ε͹)  ΞδΣϯμ Appendix
17. ࿩͞ͳ͍͜ͱ 
18. Ruby ͷ Lexer (ࣈ۟ղੳث) Ruby ͷ Parser (ߏจղੳث) Ruby ͷॻ͖ํ  ࿩͞ͳ͍͜ͱ
19. VM (Virtual Machine) ʹ͍ͭͯ 
20. VM ͱ͸ʁ 
21. VM ͱ͸ʁ - VM ͱ͸Ծ૝Ϛγϯͷ͜ͱΛࢦ͠ɼίϯϐϡʔλʔͷಈ࡞ΛΤϛϡϨʔγϣϯ ʢ࠶ݱʣͤ͞Δ΋ͷͰ͢ɻ - VM ্Ͱ Linux/Unix Λಈ͔ͨ͠Γ͍ͯ͠Δํ΋͍Δͱࢥ͍·͢ɻ - VM ΛՄೳͱ͢Δ୅දతͳ΋ͷ͸ KVM (Kernel-based Virtual Machine) ͩͬ ͨΓɼHyper-V (Windows) ͩͬͨΓɼVirtualBox ͳͲ͕ྫʹ্͕ΔͰ͠ΐ ͏ɻ  VM (Virtual Machine) ʹ͍ͭͯ
22. VM ͱ͸ʁ - Type-1, Type-2 ͱ͍͏෼ྨ͕͋ΓɼType-1 ͸ϕΞϝλϧʢϋʔυ΢ΣΞʹμ ΠϨΫτͳ΋ͷʣɼType-2 ͸ϗετܕʢطଘͷ OS ্Ͱಈ͘΋ͷʣͰ͢ɻ͜ ΕΒΛ૯ͯ͡ Hyper VisorʢϋΠύʔόΠβʔʣͱݺͿ͜ͱ͕͋Γ·͢ɻ - Docker ΋Ծ૝Ϛγϯʹࣅ͍ͯ·͕͢ɼݫີʹ͸ҟͳΓ·͢ɻVM ͸׬શʹ෼ ཭͞Εͨήετ OS ͷΧʔωϧΛ͍࣋ͬͯΔͷʹରͯ͠ɼDocker ͸ϗετ OS ͷΧʔωϧΛڞ༗͍ͯ͠·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
23. VM ͱ͸ʁ - ͱ͍͏͜ͱΛॻ͖·͕ͨ͠ɼZend VMɼJVMɼ RubyVM ͸ VM Ͱ͸͋Δ΋ͷ ͷɼ͜ͷఆٛʹ͸ݫີʹ͸౰ͯ͸·Γ·ͤΜɻ - ͔͠͠ɼઌ΄Ͳॻ͍ͨʮVM ͱ͸Ծ૝Ϛγϯͷ͜ͱΛࢦ͠ɼίϯϐϡʔλʔͷ ಈ࡞ΛΤϛϡϨʔγϣϯʢ࠶ݱʣͤ͞Δ΋ͷͰ͢ɻʯͱ͸ಉ౳Ͱ͋ΔͱղऍͰ ͖·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
24. VM ͱ͸ʁ - CPU ͸໋ྩηοτʹैͬͯಈ࡞͠·͢ɻ͜ͷ໋ྩηοτ͸਎ۙͳ΋ͷͰݴ͑ ͹ Intel ΍ ARM ͳͲʹ΋͋ΓɼͦΕͧΕҟͳΓ·͢ɻ - ͜ͷ CPU ͷ໋ྩηοτΛஞ࣮࣍ߦͤ͞Δ͜ͱ͕ίϯϐϡʔλʔ͕ಈ͘ݪཧͷ ҰͭͰ͕͢ɼZend VM ΍ JVMɼRubyVM ʹ΋໋ྩηοτ͕͋Γɼ·ΔͰίϯ ϐϡʔλʔ͕ಈ͘ݪཧʹଇ࣮ͬͯߦ͞Ε͍ͯ·͢ɻ - ͦͷͨΊɼΤϛϡϨʔγϣϯͱ͍͏จ຺Ͱ͸ VM Ͱ͋ΔͱղऍͰ͖ΔͷͰ͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
25. VM ͱ͸ʁ - ͦͯ͠ɼ͜ΕΒͷ VM ͷ΄ͱΜͲ͸ελοΫϚγϯͱͯ͠ಈ࡞͠·͢ɻ - ଞʹҰൠతͳ΋ͷ͸ϝϞϦϨδελϚγϯͳͲ͕͋Γ·͢ɻ͜Ε͸ Intel ΍ ARM ͳͲ͕֘౰͠·͢ɻ - ຊτʔΫͰ͸ɼϝϞϦϨδελϚγϯʹ͍ͭͯͷղઆ͸ׂѪ͠·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
26. ελοΫϚγϯͬͯͳʹʁ 
27. ελοΫϚγϯͬͯͳʹʁ - ελοΫϚγϯͱ͸ɼσʔλߏ଄ͷҰͭͰσʔλ Λ௥Ճʢϓογϡʣ͠ͳ͕Βɼ໋ྩηοτʹΑͬ ͯͦͷ௥Ճͨ͠σʔλΛऔಘʢϙοϓʣͯ͠ɼԿ ͔͠ΒͷܭࢉΛߦ͍ͬͯ͘ίϯϐϡʔλͷΞʔΩ ςΫνϟͰ͢ɻ - ྫ͑͹ʮελοΫ͔Β 2 ͭ஋Λϙοϓ͠Ճࢉͤ͞ ͨ΋ͷΛϓογϡ͢Δʯͱ໋͍ͬͨྩηοτ΋͋ Γ·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ 1 ճ໨ʹϓογϡ͞Εͨσʔλ 2 ճ໨ʹϓογϡ͞Εͨσʔλ N ճ໨ʹϓογϡ͞Εͨσʔλ ộ σʔλΛϓογϡ σʔλΛϙοϓ Կ͔͠Βͷ໋ྩηοτͰ σʔλΛ࢖༻ Կ͔͠Βͷ໋ྩηοτͰ σʔλΛελοΫʹ௥Ճ
28. ໋ྩηοτͬͯͳʹʁ 
29. ໋ྩηοτͬͯͳʹʁ - ໋ྩηοτͱ͸ίϯϐϡʔλʹԿ͔͠Βͷಈ࡞Λࢦࣔ͢ΔͨΊͷίϚϯυʢ໋ ྩʣͷू߹ͷ͜ͱΛࢦ͠·͢ɻ - ྫ͑͹ɼΘ͔Γ΍໋͍͢ྩʹ͸ʮՃࢉʯʮݮࢉʯʮ৐ࢉʯʮআࢉʯͷΑ͏ͳ࢛ ଇԋࢉ΍ʮಛఆͷϧʔνϯΛ࣮ߦ͢ΔʯͰ͋ͬͨΓʮ഑ྻΛ࡞੒ʯ͢Δͱ͔ʮจ ࣈྻΛ਺ࣈʹม׵͢Δʯͱ͔༷ʑͳ΋ͷ͕͋Γ·͢ɻ - ΋ͪΖΜɼVM ʹΑ໋ͬͯྩηοτ͸ҟͳΓ·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
30. ໋ྩηοτͬͯͳʹʁ - ͨͩݴ͑Δͷ͸ɼࣅͨΑ͏ͳ໋ྩηοτ͕େମͲͷ VM ʹ΋ଘࡏ͍ͯ͠·͢ɻ - ໋ྩηοτ͸ͲΕ΋୯७ԽΛ໨ࢦ͍ͯ͠Δ܏޲͕ଟ͍΋ͷ͕ଟ͍Ͱ͢ɻ୯७Խ Λ໨ࢦ͢ઃܭࢥ૝ͷ͜ͱΛ RISC ʢReduced Instruction Set Computerʣͱ ݴ͍·͢ɻٯʹ CISC (Complex Instruction Set Computer) ͱ͍͏ෳࡶͰ͸ ͋Δ໋͕ྩ਺ΛۃྗݮΒͨ͠λΠϓͷ΋ͷ΋͋Γ·͢ɻ - ࠷ۙͰ͸͋Μ·Γࠩҟ͕ͳ͍ͱ΋ݴΘΕ͍ͯ·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
31. ໋ྩηοτͬͯͳʹʁ - ·໋ͨྩ͸Ҿ਺ʢΦϖϥϯυʣΛऔΔ΋ͷ͕͋Γ·͢ɻ͜ͷΦϖϥϯυͱε λοΫΛۦ࢖໋ͯ͠ྩΛ࣮ߦ͍͖ͯ͠·͢ɻ - ·ͨɼίϚϯυΛ൪߸Ͱදͨ͠΋ͷΛʮΦϖϨʔγϣϯίʔυʢΦϖίʔυɼ OP CodeʣʯɼώϡʔϚϯϦʔμϒϧʹͨ͠΋ͷΛʮχʔϞχοΫ ʢmnemonicʣʯͱݴͬͨΓ͠·͢ɻ - ࣍ͷϖʔδ͔Β 1 + 2 + 3 ΛελοΫϚγϯͱٖͯ͠ࣅ໋ྩηοτΛ༻͍ͯܭ ࢉ͢ΔྫΛࣔ͠·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
32. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 
33. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output - constadd ໋ྩ͸ 1 ͭͷΦϖϥϯυΛऔΓɼͦΕΛελοΫ ʹϓογϡ͢Δ໋ྩ - plus ͸ελοΫ͔Β 2 ͭ஋Λϙοϓ͠ɼͦΕΛՃࢉͨ͠΋ͷ ΛελοΫʹϓογϡ͢Δ໋ྩ - output ͸ελοΫ͔ΒҰͭϙοϓ͠ग़ྗ͢Δ໋ྩ - ্هͷ 3 ͭͷ໋ྩͰ࣮ݱՄೳͰ͢ɻ͜ͷҰ࿈ͷྲྀΕΛ໋ྩ γʔέϯεͱݴͬͨΓ͠·͢ɻ
34. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 ελοΫʹ 1 Λϓογϡ
35. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 ελοΫʹ 2 Λϓογϡ 2
36. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 2 ͭͷσʔλΛϙοϓ 2 3 Ճࢉͨ݁͠ՌΛϓογϡ
37. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 3 ελοΫʹ 3 Λϓογϡ 3
38. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 3 2 ͭͷσʔλΛϙοϓ 3 6 Ճࢉͨ݁͠ՌΛϓογϡ
39. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ  VM (Virtual Machine) ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 6 1 ͭͷσʔλΛϙοϓ
40. 1 + 2 + 3 Λٙࣅ໋ྩηοτͰܭࢉ͢Δ - ֓Ͷ΄ͱΜͲͷ VM ͸ઌఔͷղઆͷΑ͏ͳܗͰ࣮૷͞Ε͍ͯ·͢ɻ͜ΕΒΛԠ ༻ͨ͠΋ͷ͕ Zend VM ͩͬͨΓɼJVM ͩͬͨΓɼͦͯ͠ຊτʔΫͷझࢫͰ͋ Δ RubyVM Ͱ͢ɻ - Ͱ͸ RubyVM ͸ͲͷΑ͏ʹ࣮૷͢ΔͷͰ͠ΐ͏͔ɻ࣍ͷηΫγϣϯͰղઆ͠ ͍͖ͯ·͢ɻ  VM (Virtual Machine) ʹ͍ͭͯ
41. ༨ஊ - ઌ΄Ͳͷ໋ྩγʔέϯεΛ࠷దԽ͢Δͱ࣮͸ʮconstadd (operand: 6)ʯͱ ʮoutputʯ͚ͩͰࡁΈ·͢ɻ໋ྩ࠷దԽΛߦ͏͜ͱͰܭࢉ͢΂͖εςοϓΛল ུͰ͖ΔͷͰɼߴ଎Խ͕ݟࠐ·Ε·͢ɻ - ͜͏͍ͬͨߴ଎ԽΛߦ͏ͷ͕ʮJIT/AOT ࠷దԽʯͱݴΘΕͨΓ͠·͢ɻ - JIT ʢJust In TimeʣίϯύΠϧํࣜͱ AOT ʢAhead Of TimeʣίϯύΠϧํ ͕ࣜ͋Γ·͕͢ɼຊτʔΫͰ͸ׂѪ͠·͢ɻChatGPT ʹฉ͍ͯΈͯͶɻ  VM (Virtual Machine) ʹ͍ͭͯ
42. VM Λ࡞Δͷʹඞཁͳ΋ͷ 
43. ΍Δؾ ࠜؾ ෛ͚ͳ͍ؾ  1 2 3 VM Λ࡞Δͷʹඞཁͳ΋ͷ
44. RubyVM ͷ͘͠Έ 
45. RubyVM ͱ͸ʁ 
46. RubyVM ͱ͸ - RubyVM ͸ YARV (Yet Another Ruby Vm) ͱ΋ݺ͹Ε Sasada Koichi (@koichisasada) ͞Μ͕ Ruby ޲͚ͷԾ૝Ϛγϯͱ࣮ͯ͠૷͖ͯͨ͠΋ͷͰ͢ [1]ɻ - YARV ͸୺తʹݴ͑͹ɼISeqʢInstruction Sequenceʣͱݺ͹ΕΔ໋ྩγʔέ ϯεʢ࣮ߦ͢΂໋͖ྩͷҰཡʣͱɼͦͷ໋ྩγʔέϯεʹର͢Δϝλ৘ใͷू ߹Ͱ͢ɻ  RubyVM ͷ͘͠Έ [1]: https://sitaramshelke.medium.com/inside-rubyvm-967b25e234db
47. RubyVM ͱ͸ - Լਤ͸ Hello World! Λग़ྗ͢ΔͨΊͷ YARV Ͱ͢ɻ  RubyVM ͷ͘͠Έ
48. RubyVM ͱ͸ - Լਤ͸ Hello World! Λग़ྗ͢ΔͨΊͷ YARV Ͱ͢ɻ  RubyVM ͷ͘͠Έ Hello World! ͱ͍͏จࣈྻ͕ݟ͑·͢Ͷ
49.  The header section (36 bytes) The payload section The instruction sequence offsets section (The information is each of instruction sequence offsets; N>0 * 4 bytes) The global object offsets section (The information is each of global object offsets; N>0 * 4 bytes) The extra data (if embedded extra data; N>=0 bytes) A part of instruction sequences A part of global objects The RUBY_PLATFORM name section (string) An information of string / class / fi xed number / bool types and data An information of instruction sequence section (In normally, 44 info * 4 bytes = 176 bytes notice: no considered hamming weight) ộ A code section (N>0 bytes) ộ A local table section (N>=0 bytes) A call info entry section (N>=0 bytes) ộ The structure of YARV The alignment section (Filled by 0xff to align every 2 bytes) ※ Ruby ຊମͷ C ࣮૷ΛಡΜͰࢲ͕ղऍͨ͠΋ͷΛςΩετɾਤʹදͨ͠΋ͷͰ͢ɻ
50. RubyVM ͱ͸ - Ruby Ͱ Hello World! Λग़ྗ͢Δʹ͸࣮͸ࠨਤͷ ίʔυͰॆ଍͠·͢ɻ͔͠͠ɼYARV ʹͳΔͱ࿩ ͕มΘΓ·͢ɻ - RubyVM ʹݶΒͣ VM Λ࣮૷͠ɼHello World Λ ग़ྗ͢Δ·Ͱَ͕໳Ͱ͢ɻ໋ྩηοτΛ࣮૷͢Δ ͷ͸ͦ͜·Ͱۤ࿑͠·ͤΜ͕ɼ໋ྩηοτΛΤ ϛϡϨʔτ͢Δ VM ͦͷ΋ͷΛ࣮૷͢Δͷʹۤ࿑ ͠·͢ɻͦΕָ͕ܹࢗ͘͠తͳͷͰ͢ɻ  RubyVM ͷ͘͠Έ
51.  Hello World ͕ग़ྗͰ͖ͨͱ͖͸ɼͦΕ͸΋͏
52.  ຐԦ৓ʹ౸ୡͨ͠Α͏ͳؾ࣋ͪʹͳΓ·͢
53. RubyVM ͷ࡞Γํ 
54. 
55.  ChatGPT Ͱ͸ղઆͰ͖ͳ͍͜ͱΛղઆ͠·͢
56.  ※ PHP Ҏ֎Ͱ΋࣮૷Ͱ͖·͢
57. ͦ΋ͦ΋Ͳ͏΍࣮ͬͯ૷͢Δͷʁ 
58. ͦ΋ͦ΋Ͳ͏΍࣮ͬͯ૷͢Δͷʁ - JVM ʹ͸ Java Virtual Machine Speci fi cation[1] ͱݺ͹ΕΔυΩϡϝϯτ͕ ॆ࣮͍ͯ͠·͢ɻ - Java ͸اۀओମͰ͕͢ɼRubyVM ͷ৔߹ίϛϡχςΟʹΑͬͯ։ൃ͞Ε͍ͯ Δ͜ͱ΋͋Γ༗ࢤͨͪʹΑͬͯυΩϡϝϯτͷ੔උ͕ͳ͞Ε͍ͯ·͕͢ VM ͷ ࣮૷ํ๏ʹݶͬͯݴ͑͹اۀओମͱൺֱ͢ΔͱͲ͏ͯ͠΋ݶք͕͋Γ·͢ɻ - ͦΜͳதɼRubyVM Λ࡞Δʹ͸Ͳ͏ͨ͠Β͍͍Ͱ͠ΐ͏͔ɻ  RubyVM ͷ࡞Γํ [1]: https://docs.oracle.com/javase/specs/jvms/se8/html/
59. ౴͑: C Ͱॻ͔ΕͨίʔυΛಡΉ 
60. https://github.com/m3m0r7/rubyvm-on-php 
61. RubyVM ͷߏ଄ 
62. ※ Ruby ͷόʔδϣϯ͸ 3.2 Ͱղઆ͠·͢ 
63. େ·͔ͳྲྀΕ 
64. େ·͔ͳྲྀΕ  RubyVM ͷ࡞Γํ YARV ϔομʔͷಡΈࠐΈ Instruction Sequence ͷΦϑηοτ৘ใͷಡΈࠐΈ άϩʔόϧΦϒδΣΫτͷΦϑηοτ৘ใͷ 
 ಡΈࠐΈ Instruction Sequence ͷಡΈࠐΈ 0 ൪໨ͷ Instruction Sequence ͷ࣮ߦ
65. Ͳ͏΍ͬͯ PHP ͰόΠφϦΛಡΉͷ͔ 
66. Ͳ͏΍ͬͯ PHP ͰόΠφϦΛಡΉͷ͔ - ͦ΋ͦ΋ YARV ϑΝΠϧΛੜ੒͢Δͱ͜Ζ͔ΒελʔτͰ͢ɻRuby ʹ͸ Instruction Sequence Λు͖ग़ͨ͢Ίͷɹ RubyVM::InstructionSequence.compile ͕༻ҙ͞Ε͍ͯ·͢ɻҎԼͷΑ͏ͳ ίϚϯυΛ༻͍ͯ HelloWorld.yarv ͱ͍͏ YARV ϑΝΠϧΛ࡞੒͠·͢ɻ  RubyVM ͷ࡞Γํ
67. Ͳ͏΍ͬͯ PHP ͰόΠφϦΛಡΉͷ͔ - VM ࣮૷ʹ͓͍ͯɼΑ͘༻͍ΒΕΔ PHP ͷؔ਺͸ fread, fseek, unpack ͷ 3 छ ྨͰ͢ɻ͓͖֮͑ͯ·͠ΐ͏ɻ - ΋ͪΖΜ unpack Λ࢖Θͳ͍Ͱߦ͏࣮૷΋ϏοτԋࢉΛ༻͍Ε͹ՄೳͰ͢ɻϏο τԋࢉʹ͍ͭͯ͸ׂѪ͠·͢ɻ - PHP ͸ C ݴޠͱҧ͍ɼࢦఆͨ͠ܕͰόΠφϦΛಡΜͰ͘Εͳ͍ͷͰɼࢦఆͨ͠ Φϑηοτʢfseekʣ͔ΒจࣈྻͰҰ౓औಘʢfreadʣͨ͋͠ͱʹ਺஋ܕͳΓɼ ුಈখ਺఺ܕͳΓʹม׵ͯ͋͛͠Δඞཁʢunpackʣ͕ੜ͡·͢ɻ  RubyVM ͷ࡞Γํ
68. ϔομʔΛಡΉ 
69. େ·͔ͳྲྀΕ  RubyVM ͷ࡞Γํ YARV ϔομʔͷಡΈࠐΈ Instruction Sequence ͷΦϑηοτ৘ใͷಡΈࠐΈ άϩʔόϧΦϒδΣΫτͷΦϑηοτ৘ใͷ 
 ಡΈࠐΈ Instruction Sequence ͷಡΈࠐΈ 0 ൪໨ͷ Instruction Sequence ͷ࣮ߦ
70.  magic major version minor version size extra size global object list size iseq list offset global object list offset YARV ͷϔομʔ 4 byte 4 byte 4 byte 4 byte 4 byte 4 byte 4 byte 4 byte YARB (Yet Another Ruby Binary) ͱ͍͏ 
 ஋͕औಘͰ͖·͢ ίϯύΠϧ͞Εͨ Ruby ͷϝδϟʔόʔδϣϯ͕औಘ Ͱ͖·͢ɻྫͷ৔߹ʮ3ʯͰ͢ ίϯύΠϧ͞Εͨ Ruby ͷϚΠφʔόʔδϣϯ͕औಘ Ͱ͖·͢ɻྫͷ৔߹ʮ2ʯͰ͢ όΠφϦͷจࣈྻ௕͕औಘͰ͖·͢ Instruction Sequence ͕͍ͭ֨͘ೲ͞Ε͍ͯΔ͔Λ औಘͰ͖·͢ Ruby ͷγϯϘϧͷ৘ใ͕͍ͭ֨͘ೲ͞Ε͍ͯΔ͔Λ औಘͰ͖·͢ɻ όΠφϦ্ͷ Instruction Sequence ͷҐஔ৘ใΛऔ ಘͰ͖·͢ɻ Ruby ͷγϯϘϧͷ৘ใͳͲͷҐஔ৘ใ͕֨ೲ͞Εͯ ͍ΔϦετΛऔಘͰ͖·͢ɻ ͏·͘औಘͰ͖Δͱ
 ӈਤͷΑ͏ʹͳΓ·͢ iseq size 4 byte ಠࣗʹ௥Ճ͞ΕΔ֦ுσʔλͷจࣈྻ௕͕औಘͰ͖ ·͢
71.  V (unsigned long, ϦτϧΤϯσΟΞϯ) Ͱऔಘ͠·͢
72. Φϑηοτ৘ใΛऔಘ 
73. େ·͔ͳྲྀΕ  RubyVM ͷ࡞Γํ YARV ϔομʔͷಡΈࠐΈ Instruction Sequence ͷΦϑηοτ৘ใͷಡΈࠐΈ άϩʔόϧΦϒδΣΫτͷΦϑηοτ৘ใͷ 
 ಡΈࠐΈ Instruction Sequence ͷಡΈࠐΈ 0 ൪໨ͷ Instruction Sequence ͷ࣮ߦ
74.  iseq list offset ʹΧʔιϧΛҠಈ iseq list size ෼ϧʔϓΛճ͠ 4 όΠτ͝ͱͷ 
 Φϑηοτ৘ใΛऔಘ͢Δ global object list offset ʹΧʔιϧΛҠಈ global object list size ෼ϧʔϓΛճ͠ 4 όΠτ͝ͱ ͷΦϑηοτ৘ใΛऔಘ͢Δ Instruction Sequence ͷΦϑηοτ৘ใϦετΛऔಘ Global Object ͷΦϑηοτ৘ใϦετΛऔಘ
75. Instruction Sequence ͷಡΈࠐΈ 
76. େ·͔ͳྲྀΕ  RubyVM ͷ࡞Γํ YARV ϔομʔͷಡΈࠐΈ Instruction Sequence ͷΦϑηοτ৘ใͷಡΈࠐΈ άϩʔόϧΦϒδΣΫτͷΦϑηοτ৘ใͷ 
 ಡΈࠐΈ Instruction Sequence ͷಡΈࠐΈ 0 ൪໨ͷ Instruction Sequence ͷ࣮ߦ
77. Instruction Sequence ͷಡΈࠐΈ - RubyVM ͷ࣮૷ʹ͸ޮ཰తʹόΠφϦΛѻ͏ͨΊʹ ʮibf_(?:load|dump_write)_small_valueʯͱ͍͏֓ ೦͕͋Γ·͢[1]ɻ - ϋϛϯάॏΈ[2] ʢpopcount, population countʣͳ ͲΛ༻͍ͯόΠτ௕ΛՄมతʹѻ͍ͬͯΔ΋ͷͰ͢ɻ ࣮૷ྫ͸ࠨਤͷ௨Γɻ  RubyVM ͷ࡞Γํ [1]: https://github.com/ruby/ruby/blob/2f603bc4/compile.c#L11262-L11273
 [2]: https://ja.wikipedia.org/wiki/%E3%83%8F%E3%83%9F%E3%83%B3%E3%82%B0%E9%87%8D%E3%81%BF
78. Instruction Sequence ͷಡΈࠐΈ - readSmallValue ͕࣮૷Ͱ͖ͨΒಡΈࠐΉ΂͖ 0 ൪໨ͷ Instruction Sequence ͷσʔλߏ଄ΛಡΈࠐΜͰ͍͖·͢ɻ - ͜ͷσʔλߏ଄ɼ࣮͸ͱͯ΋ڊେͰ Instruction Sequence ͷϝλ৘ใʢྫ֎ ςʔϒϧͳͲʣʹ֘౰͢Δ΋ͷͳͷͰ͕͢ɼͦͷϝλ৘ใͷ਺͸ 50 ݸҎ্͋ Γ·͢…ɻ - ͜ͷσʔλߏ଄શͯΛಡ·ͳͯ͘΋ɼHelloWorld ͷग़ྗͰ͋Ε͹໰୊ͳ͘Մ ೳͳͷͰɼׂѪͯ͠ඞཁͳ 4 ͭͷϝλ৘ใΛಡΈࠐΈ·͢ɻ  RubyVM ͷ࡞Γํ
79. Instruction Sequence ͷಡΈࠐΈ - ۩ମతͳ࣮૷ྫ͸ Ruby ຊՈͷ࣮૷ʢ https://github.com/ruby/ruby/blob/ 2f603bc4/compile.c#L12125 ʣΛಡΉ͔ɼRubyVM on PHP ʢ https:// github.com/m3m0r7/rubyvm-on-php/blob/0.3.2.2/src/VM/Core/Runtime/ Kernel/Ruby3_2/InstructionSequence/ InstructionSequenceProcessor.php#L61 ʣͷ࣮૷Λ͝ཡ͍ͩ͘͞ɻ  RubyVM ͷ࡞Γํ
80.  type iseq size bytecode offset bytecode size Instruction Sequence ΛಡΉ sv sv sv sv ※ sv ͸ small value ͷུ Instruction Sequence ͷΦϑηοτϦετ 0 ൪໨ 
 ʹΧʔιϧΛҠಈ
81. Instruction Sequence ͷ࣮ߦ 
82. େ·͔ͳྲྀΕ  RubyVM ͷ࡞Γํ YARV ϔομʔͷಡΈࠐΈ Instruction Sequence ͷΦϑηοτ৘ใͷಡΈࠐΈ άϩʔόϧΦϒδΣΫτͷΦϑηοτ৘ใͷ 
 ಡΈࠐΈ Instruction Sequence ͷಡΈࠐΈ 0 ൪໨ͷ Instruction Sequence ͷ࣮ߦ
83. Instruction Sequence ͷ࣮ߦ - ઌ΄ͲಡΈࠐΜͩ Instruction Sequence ͔Β $bytecodeO ff set, $iseqSize Λ༻͍ͯɼ໋ྩγʔέϯε Λऔಘ͠·͢ɻ - HelloWorld! Λग़ྗ͢Δࡍʹ࢖͏໋ྩηοτ͸ʮputself (18)ʯʮputstring (21)ʯʮopt_send_without_block (51)ʯʮleave (60)ʯͷ 4 छྨͰ͢ɻ - ࠨਤͷΑ͏ʹχʔϞχοΫΛॻ͖ग़͠·͢ɻ  RubyVM ͷ࡞Γํ ͜ͷΦϖϨʔγϣϯίʔυͱχʔϞχοΫͷඥ͚ͮ͸ https://github.com/ruby/ruby/blob/ruby_3_2/yjit/src/cruby_bindings.inc.rs#L849- L1050 Ͱॻ͔Ε͍ͯ·͢
84. Instruction Sequence ͷ࣮ߦ  RubyVM ͷ࡞Γํ putself putstring(operand: "HelloWorld!") leave opt_send_without_block ελοΫ ελοΫʹ࣮ߦதͷίϯςΩετΛ
 ϓογϡ ࣮ߦதͷίϯςΩετ
85. Instruction Sequence ͷ࣮ߦ  RubyVM ͷ࡞Γํ putself putstring(operand: "HelloWorld!") leave opt_send_without_block ελοΫ ελοΫʹ HelloWorld! ͷ
 จࣈྻΛϓογϡ ࣮ߦதͷίϯςΩετ "HelloWorld!"
86. Instruction Sequence ͷ࣮ߦ  RubyVM ͷ࡞Γํ putself putstring(operand: "HelloWorld!") leave opt_send_without_block ελοΫ 2 ͭͷελοΫΛϙοϓ ࣮ߦதͷίϯςΩετͷ 
 puts ϝιουΛݺͼग़͠ ࣮ߦதͷίϯςΩετ "HelloWorld!"
87. Instruction Sequence ͷ࣮ߦ  RubyVM ͷ࡞Γํ putself putstring(operand: "HelloWorld!") leave opt_send_without_block ελοΫ ←࣮ߦͷऴྃॲཧɼฦΓ஋ΛૹΔ
88. Instruction Sequence ͷ࣮ߦ - ͪͳΈʹɼYARV ʹม׵͞Εͨ͋ͱͷ໋ྩγʔέϯεΛऔಘ͢Δʹ͸ʢjavap ί ϚϯυͷΑ͏ͳ΋ͷ͸ʣʮputs RubyVM::InstructionSequence.compile("puts 'HelloWorld!'", "HelloWorld.rb").disasmʯͷΑ͏ʹ͢ΔͱՄೳͰ͢ɻ  RubyVM ͷ࡞Γํ
89. Instruction Sequence ͷ࣮ߦ - ࠨਤͷΑ͏ʹݺͼग़͠ݩͷ Main ΫϥεͱάϩʔόϧͳΦ ϒδΣΫτʹอଘ͞Ε͍ͯΔ஋ Λऔಘ͢ΔͨΊͷ loadObject Λ࣮૷͠·͢ɻ  RubyVM ͷ࡞Γํ ͜͜ͷ൪߸͸ https://github.com/ruby/ruby/blob/ruby_3_2/compile.c#L12906- L12939 ͷ 5 ൪໨ͷؔ਺Λࢦ͍ͯ͠·͢ (ibf_load_object_string)
90.  putself ໋ྩͷ࣮૷ putstring ໋ྩͷ࣮૷ opt_send_without_block ໋ྩͷ࣮૷ leave ໋ྩͷ࣮૷
91. Instruction Sequence ͷ࣮ߦ - ࠨਤͷΑ͏ʹ HelloWorld! ͕ग़ྗ͞ΕΔ͜ ͱ͕Θ͔Γ·͢ɻ - ࠓ·Ͱͷιʔείʔυͷྫ͸ҎԼͷ gist ʹ ·ͱΊͯ͋Γ·͢ɻ - https://gist.github.com/ m3m0r7/226e20c8115caf4a9d43b291861 f978b  RubyVM ͷ࡞Γํ
92. DEMOʢ͕࣌ؒ͋Ε͹ʣ 
93. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ ʢ࣍ϖʔδҎ߱ʹ Appendix ͕͖ͭͮ·͢ʣ 
94. Appendix: CallInfoEntry ʹ͍ͭͯ 
95. Appendix: CallInfoEntry ʹ͍ͭͯ  RubyVM ͷ࡞Γํ - RubyVM ্ͷ CallInfoEntry ͸࣮ߦ͞ΕΔϝιουͷϝλ৘ใΛऔಘ͢ΔͨΊ ʹඞཁͳ΋ͷͰ͢ɻ - ֨ೲ͞Ε͍ͯΔ৘ใ͸ʮϝιου໊ʯʮҾ਺ͷ਺ʯͳͲͰ͢ɻຊདྷ͸͜ΕΒΛ ༻͍ͯɼಈతʹϝιουΛ࣮ߦʢopt_send_without_block ໋ྩͷ࣮ߦʣΛ͞ ͤΔඞཁ͕͋Γ·͢ɻ - CallInfoEntry ͸࣍ͷϖʔδͷΑ͏ʹ࣮૷͢Δ͜ͱͰ puts Λࢦఆͤͣʹݺͼग़ ͢͜ͱ͕Ͱ͖·͢ɻ
96.  $bytecodeSize ม਺ͷਅԼʹ௥Ճɻ 
 ࢖͏ͷ͸͜ͷ 2 ͭͷม਺ͷΈ ※ଞͷม਺΋ʮϩʔΧϧม਺ʯͱ͔ ʮྫ֎ॲཧʯͱ͔༷ʑͳ༻్ͰඞཁͰ͕͢ HelloWorld! ͷ
 ग़ྗͰ͸ඞਢͰ͸ͳ͍ͷͰׂѪ͠·͢ $ciSize ͷਅԼʹҎԼΛ௥Ճ ग़ྗ݁Ռ
97.  มߋ
98.  $ciIndex = 0 ͷ௥Ճ มߋ
99. Appendix: CallInfoEntry ʹ͍ͭͯ  RubyVM ͷ࡞Γํ - ͜ΕͰ CallInfoEntry Λ࢖ͬͯϝιου໊Λࣗಈతʹղܾɼ·ͨҾ਺ͷ਺΋ղ ܾ͍ͯ͠ΔͷͰɼҾ਺͕૿͑ͨ৔߹Ͱ΋ϝιουͷݺͼग़͕͠Ͱ͖ΔΑ͏ʹͳ Γ·͢ɻ - ΋ͪΖΜ CallInfoEntry Ҏ֎ʹ΋ϩʔΧϧม਺ςʔϒϧʢϝιου͕ड͚औΔ Ҿ਺ͷ৘ใʣͰ͋ͬͨΓɼྫ֎ॲཧͰ͋ͬͨΓɼॏཁͳ৘ใ΋͋Γ·͢ɻ - HelloWorld! Λग़ྗͰ͖ͨઌɼ΋͋͠ͳ͕ͨ RubyVM ͷ࣮૷ʹڵຯΛ࣋ͪ࢝ ΊͨΒɼίʔυΛಡΜͰҙຯΛཧղ࣮͠૷ͯ͠Έͯ͸͍͔͕Ͱ͠ΐ͏͔ɻ
100. Appendix: CallInfoEntry ʹ͍ͭͯ  RubyVM ͷ࡞Γํ - มߋՕॴ·ͰؚΊͨίʔυ͸ҎԼͷ gist Λࢀর͍ͯͩ͘͠͞ - https://gist.github.com/m3m0r7/226e20c8115caf4a9d43b291861f978b? permalink_comment_id=4686761#gistcomment-4686761
101. Appendix: RubyVM ͷ໋ྩηοτ਺ʹ͍ͭͯ 
102. Appendix: RubyVM ͷ໋ྩηοτ਺ʹ͍ͭͯ  RubyVM ͷ࡞Γํ - RubyVM ͷ໋ྩηοτͷ਺͸ 100 ݸ΄ͲͰ͢ʢ࣮ମ͸ 200 ݸ΄ͲͰ͕͢ɼ൒ ෼͸໋ྩΛτϨʔε͢ΔͨΊͷ໋ྩηοτͰ͢ʣɻͪͳΈʹ JVM ͸ 150 ݸ΄ ͲͰ͢ʢSE 13ʣɻ - ୯७ͳ HelloWorld! ͷग़ྗ΍ FizzBuzzɼΫΠοΫιʔτͷϨϕϧײͰ͋Ε ͹ɼશ࣮ͯ૷͠ͳͯ͘΋͍͔ͭ͘ͷ໋ྩηοτΛ࣮૷͢Ε͹࣮ߦ͢Δ͜ͱ͕Մ ೳʹͳΓ·͢ɻ
103. Appendix: RubyVM ͷ໋ྩηοτ਺ʹ͍ͭͯ  RubyVM ͷ࡞Γํ - RubyVM ͕ఏڙ͍ͯ͠Δ໋ྩηοτ͸ҎԼΛࢀর͍ͯͩ͘͠͞ - https://github.com/ruby/ruby/blob/ruby_3_2/insns.def - PHP Ͱͷ࣮૷ྫ͸ҎԼΛࢀর͍ͯͩ͘͠͞ɻ - https://github.com/m3m0r7/rubyvm-on-php/tree/0.3.2.2/src/VM/Core/ Runtime/Executor/Insn/Processor
104. Appendix: Ͳ͏΍ͬͯ Ruby ຊମΛࣸܦ͢Δ͔ 
105. Appendix: Ͳ͏΍ͬͯ Ruby ຊମΛࣸܦ͢Δ͔  RubyVM ͷ࡞Γํ - Ruby ຊମͷɼͱΓΘ͚ VM Λ࣮૷͍ͯ͠ΔՕॴΛͲ͏΍ͬͯࣸܦ͢Δ͔Ͱ͢ ͕ɼجຊతʹ͸ compile.c ʢ https://github.com/ruby/ruby/blob/ruby_3_2/ compile.c ʣΛோΊΔͷ͕Ұ൪खͬऔΓૣ͍Ͱ͢ɻ - `ibf_load_*` ͱॻ͔Ε͍ͯΔؔ਺Λ௥͏ͱྑ͍Ͱ͢ɻ - ͱ͸͍͑ɼͲͷॱ൪Ͱݺͼग़͞ΕΔ͔ʹ͍ͭͯ͸ίʔυΛ௥͍͔ͬͯͳ͍ͱΘ ͔Βͳ͍ͷͰɼେ·͔ʹͲ͏΍ͬͯ௥͑͹͍͍͔࣍ϖʔδͰϑϩʔਤΛॻ͍ͯ ͓͖·͢ɻ
106. Appendix: Ͳ͏΍ͬͯ Ruby ຊମΛࣸܦ͢Δ͔  RubyVM ͷ࡞Γํ rb_iseq_ibf_load ibf_load_setup ibf_load_iseq rb_ibf_load_iseq_compl ete ibf_load_iseq_each ibf_load_code ಡΈࠐΜͩ iseq Λ 
 ฦ͢ ibf_load_small_value ibf_load_object ibf_load_outer_variables ibf_load_param_opt_tabl e ibf_load_param_keywor d ibf_load_insns_info_bod y ibf_load_insns_info_posi tions ibf_load_local_table ibf_load_catch_table ibf_load_iseq_each Ͱݺ͹ΕΔؔ਺܈ ࠶ؼతʹ ibf_load_iseq ͕ݺͼग़͞ΕΔ compile.c ← Ruby ͷ RubyVM::InstructionSequence.load_from_binary ϝιουΛݺͼग़ͨ͠ࡍʹݺ͹ΕΔؔ਺ 
 (https://github.com/ruby/ruby/blob/ruby_3_2/iseq.c#3733, https://github.com/ruby/ruby/blob/ruby_3_2/iseq.c#3942) iseqw_s_load_from_bina ry iseq.c ibf_load_id
107. Appendix: ϩʔΧϧม਺ͷׂ౰ 
108. Appendix: ϩʔΧϧม਺ͷׂ౰  RubyVM ͷ࡞Γํ - ఆٛͨ͠ϢʔβʔϥϯυͷϝιουΛ࣮૷͢Δࡍʹ᪴͘ϙΠϯτͷҰͭͱͯ͠ ϩʔΧϧม਺ͷׂ౰͕͋Γ·͢ɻࢲࣗ਎΋͍᪴ͯ·ͨ͠ɻ - ఆٛ͞ΕͨϝιουΛ࣮ߦ͢Δࡍʹɼ࣮ߦ࣌ʹʢελοΫʹϓογϡ͓ͯ͘͠ ͷͰ͸ͳ͘ʣҾ਺Λ༧ΊϩʔΧϧςʔϒϧʹηοτ͓ͯ͘͠ඞཁ͕͋ΔͷͰ͢ ͕ɼͦͷηοτ͢ΔҾ਺ͷҐஔΛٻΊͳ͚Ε͹ͳΓ·ͤΜɻ - ιʔείʔυΛಡΉݶΓ EP (environment pointer) Λ༻ҙͯ͠ٻΊ͍ͯΔΑ͏ Ͱ͕͢ɼຊࢿྉͰ͸ EP Λ࢖Θͳ͍ͰٻΊ·͢ɻ
109.  VM_ENV_DATA_SIZE ϝιου಺ͷม਺܈ ϝιουͷҾ਺ local table size: 4 0 1 2 3 4 6 5 slot index var4 -> slot[3] var3 -> slot[4] var2 -> slot[5] var1 -> slot[6] call info argc: 2 - ྫͷ varN (N ͸ࣗવ਺, N>0) ͸ ʮVM_ENV_DATA_SIZE + local table size - (N - 1)ʯͰٻΊΒΕ·͢ɻͭ·Γ var1 ͸ʮVM_ENV_DATA_SIZE(3) + local table size(4) - N(1)ʯͰ slot[6] ʹ֨ೲ͞ΕΔ͜ͱ͕Θ͔Γ·͢ɻ - ϝιουʹ౉͢Ҿ਺͸ఆٛ͞ΕͨҾ਺ͷॱংͱ͸ٯͰ slot index ʹඥ෇͚Δඞཁ͕͋Γ·͢ - opcode ͷ [gs]etlocal(?:_WC[01]|) ΋͜Εʹैͬͯ஋ΛऔΔΑ͏ʹͳ͍ͬͯ·͢ - 3 ൪໨͔Βελʔτͳͷ͸ɼRubyVM ʹඞཁͳ৘ใΛຒΊࠐΜͰ͍ΔͨΊͬΆ͍ʢʁʣʢVM_ENV_DATA_INDEX_ME_CREF, VM_ENV_DATA_INDEX_SPECVAL, VM_ENV_DATA_INDEX_FLAGSʣ - Ҿ਺͕͋Δ৔߹͸ϝιουݺͼग़͠ͷલʹ༧Ί slot ʹ஋ΛೖΕͯϝιουݺͼग़͠Λߦ͏ඞཁ͕͋Γ·͢ɻྫͰ͸ var1 ͸ slot[6], var2 ͸ slot[5] ʹ༧Ί஋ΛೖΕ͓ͯ͘ඞཁ͕͋Γ·͢ɻ
 ͳ͓ɼvar3 ΍ var4 ͸಺෦ͷ໋ྩγʔέϯεʹ͓͍ͯ setlocal ͕ݺͼग़͞ΕΔͷͰɼ༧Ί஋ΛೖΕ͓ͯ͘ඞཁ͸͋Γ·ͤΜɻ
 (࣮૷ͷώϯτ: https://github.com/m3m0r7/rubyvm-on-php/blob/0.3.2.2/src/VM/Core/Runtime/Executor/CallBlockHelper.php#L121 )
110. Appendix: ϩʔΧϧม਺ͷׂ౰  RubyVM ͷ࡞Γํ - ͞Βʹ RubyVM ͷϩʔΧϧม਺ʹ͸ level ͱ͍͏֓೦͕͋Γ·͢ɻlevel = 0 ͸ݱ ࡏͷ࣮ߦίϯςΩετΛද͢΋ͷͰɼlevel ͕ 1, 2, 3 ... ͱ૿͍͑ͯ͘͝ͱʹ level ͷ਺͚ͩલͷίϯςΩετʢRuby ຊମͷίʔυ্Ͱ͸ VM_ENV_PREV_EP ϚΫ ϩʹ֘౰ʣͷϩʔΧϧม਺Λࢀর͠·͢ʢ࣍ϖʔδਤࢀরʣɻ - ࣮ߦதͷίϯςΩετ͔Βݟͯɼ૬ରҐஔͱͯ͠ม਺ͷ͋ΔίϯςΩετͷ৔ॴ Λදͨ͠ͷ͕ level ͩͱࢥ͏ͱΘ͔Γ΍͍͔͢΋͠Ε·ͤΜɻ - ͦͷͨΊɼ࣮૷࣌ͷ஫ҙ఺ͱͯ͠ίϯςΩετ͸ḪΕΔΑ͏ʹ͓ͯ͘͠ඞཁ͕͋ Γ·͢ɻ
111.  var3 ΁ͷ୅ೖ͸࣮ߦ࣌ͷίϯςΩετͳͷͰ 
 level ͸ 0 Ͱ setlocal_WC0 ͕૸Δ var3 ͕ఆٛ͞Ε͍ͯΔͷ͸ҰͭલͷίϯςΩετͳͷͰ 
 ࣮ߦதͷίϯςΩετ͔Βݟͯ level ͸ 1 Ͱ getlocal_WC1 ͕૸Δ var3 ͕ఆٛ͞Ε͍ͯΔͷ͸ҰͭલͷίϯςΩετͳͷͰ 
 ࣮ߦதͷίϯςΩετ͔Βݟͯ level ͸ 1 Ͱ setlocal_WC1 ͕૸Δ var1, var2 ͕ఆٛ͞Ε͍ͯΔͷ͸࣮ߦதͷίϯςΩετͳͷͰ level ͸ 0 Ͱ getlocal_WC0 ͕૸Δ ݺͼग़͠ʢ಺෦తʹ send/ opt_send_without_block ͳͲͷ opcode ͕ݺͼग़͞Εͱ͖ʣ͕͋Δͱ ࣮ߦίϯςΩετ͕มΘΔ