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mruby ͷ Hello World
2018/07/20 Fukuoka.rb #100 LT
ODA Hirohito
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mruby ͱԿͧʁ
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mruby ͱԿͧʁ
https://github.com/mruby/mruby#what-is-mruby
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mruby ͱԿͧʁ
ࠐιϑτΣΞʹΘΕΔࣄΛతͱͨ͠
ܰྔͳߴڃϓϩάϥϛϯάݴޠ
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Hello World
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αϯϓϧίʔυ
https://github.com/mruby/mruby/wiki/Hello-World#source-code
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࣮ߦ݁Ռ
https://github.com/mruby/mruby/wiki/Hello-World#execution
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ͪΐͬͱͬͯʂ
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ͳΜ͔ίʔυ͘ͳ͍ʁ
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Ruby Ͱॻ͍ͨ Hello World
C Ͱॻ͍ͨ Hello World
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͜ͷίʔυԿΛ͍ͬͯΔʁ
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No content
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puts C ͷؔ
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͜ΕΒ͕ mruby ͷػೳʢͷͣʣ
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͜Εͻͱ·ͣແࢹ
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1. όʔνϟϧϚγϯΛද͢ʮmrb_stateʯͷॳظԽ
2. ϓϩάϥϜݻ༗ͷΫϥεɺϝιουͷఆٛ
3. Ruby ϓϩάϥϜͷίϯύΠϧͱ࣮ߦ
4. ඞཁʹԠͯ͡ʢϓϩάϥϜݻ༗ͷʣϝιουͷ
ݺͼग़͠
5. ޙ࢝
·ͭͱΏ͖ͻΖ ࠐ Rubyʮmrubyʯͷͯ͢ ૯ूฤ ୈ 3 ճ
mruby ΛΈࠐΜͩϓϩάϥϜͷڍಈ
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•mrb_state *mrb = mrb_open();
•mrb_load_string(mrb, “p ‘hello world!’”);
•mrb_close(mrb);
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•mrb_state *mrb = mrb_open();
•mrb_load_string(mrb, “p ‘hello world!’”);
•mrb_close(mrb);
→ ϙΠϯλʔม mrb ΛΦʔϓϯͯͦ͠͏
→ mrb ΛΫϩʔζͯͦ͠͏
→ mrb ʹจࣈྻΛϩʔυͯͦ͠͏
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•mrb_state *mrb = mrb_open();
•mrb_load_string(mrb, “p ‘hello world!’”);
•mrb_close(mrb);
→ ϙΠϯλʔม mrb ΛΦʔϓϯͯͦ͠͏
→ mrb ΛΫϩʔζͯͦ͠͏
→ mrb ʹจࣈྻΛϩʔυͯͦ͠͏
→ mrb ͷϝϞϦʔྖҬΛ֬อͯͦ͠͏
→ mrb ͷϝϞϦʔྖҬΛղ์ͯͦ͠͏
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•mrb_state *mrb = mrb_open();
•mrb_load_string(mrb, “p ‘hello world!’”);
•mrb_close(mrb);
→ ϙΠϯλʔม mrb ΛΦʔϓϯͯͦ͠͏
→ mrb ΛΫϩʔζͯͦ͠͏
→ mrb ʹจࣈྻΛϩʔυͯͦ͠͏
→ mrb ͷϝϞϦʔྖҬΛ֬อͯͦ͠͏
→ mrb ͷϝϞϦʔྖҬΛղ์ͯͦ͠͏
→ mrb ʹจࣈྻΛϩʔυ࣮ͯ͠ߦͯͦ͠͏
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1. όʔνϟϧϚγϯΛද͢ʮmrb_stateʯͷॳظԽ
2. ϓϩάϥϜݻ༗ͷΫϥεɺϝιουͷఆٛ
3. Ruby ϓϩάϥϜͷίϯύΠϧͱ࣮ߦ
4. ඞཁʹԠͯ͡ʢϓϩάϥϜݻ༗ͷʣϝιουͷ
ݺͼग़͠
5. ޙ࢝
·ͭͱΏ͖ͻΖ ࠐ Rubyʮmrubyʯͷͯ͢ ૯ूฤ ୈ 3 ճ
mruby ΛΈࠐΜͩϓϩάϥϜͷڍಈ
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1. όʔνϟϧϚγϯΛද͢ʮmrb_stateʯͷॳظԽ
2. ϓϩάϥϜݻ༗ͷΫϥεɺϝιουͷఆٛ
3. Ruby ϓϩάϥϜͷίϯύΠϧͱ࣮ߦ
4. ඞཁʹԠͯ͡ʢϓϩάϥϜݻ༗ͷʣϝιουͷ
ݺͼग़͠
5. ޙ࢝
mruby ΛΈࠐΜͩϓϩάϥϜͷڍಈ
→ mrb_open()
→ mrb_close(mrb)
→ mrb_load_string(mrb, “p ‘hello world!’”)
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gdb
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͜͜ʹϒϨΠΫϙΠϯτΛஔ͍ͯ
εςοϓΞτ࣮ߦ͢Δ
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←͜͜Ͱʮhello world!ʯΛग़ྗ
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←͜͜Ͱʮhello world!ʯΛग़ྗ
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mrb_load_string_cxt Λ
͍͔͚ͯΈΔ
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mrb_load_string_cxt
↓
mrb_load_nstring_cxt
↓
mrb_load_exec
↓
mrb_top_run
↓
mrb_vm_run
↓
mrb_vm_exec
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mrb_vm_exec 2,000 ߦͷؔ
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mruby ͷ verbose Φϓγϣϯ
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mrb_vm_exec ؔʹ͋Δ
ΦϖϥϯυͱࣅͨΑ͏ͳͷ͕
ग़ྗ͞Ε͍ͯΔؾ͕͢Δ
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ͳΜ͔ಡΊΔΑ͏ͳ
ؾ͕͠ͳ͘ͳ͘ͳͬͨʂ
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ᶃ Ϩδελʔ R1 ʹ self ΛϩʔυʢϨγʔόʔΛઃఆʣ
ᶄ Ϩδελʔ R2 ʹ ‘hello world!’ ΛೖʢҾΛઃఆʣ
ᶅ Ϩδελʔ R1 ͷΦϒδΣΫτʹରͯ͠ ‘p’ ϝιουΛ
Ҿ͕̍ͭͰ࣮ߦ
ɾɾɾᶃ
ɾɾɾᶄ
ɾɾɾᶅ
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ᶃ Ϩδελʔ R1 ʹ self ΛϩʔυʢϨγʔόʔΛઃఆʣ
ᶄ Ϩδελʔ R2 ʹ ‘hello world!’ ΛೖʢҾΛઃఆʣ
ᶅ Ϩδελʔ R1 ͷΦϒδΣΫτʹରͯ͠ ‘p’ ϝιουΛ
Ҿ͕̍ͭͰ࣮ߦ
ɾɾɾᶃ
ɾɾɾᶄ
ɾɾɾᶅ
→ ݁Ռ “hello world!” Λग़ྗ͢Δ
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ͭ·Γ
mrb_load_string(mrb, “p ‘hello world!’”)
1. mruby VM Λද͢ mrb ʹ
2. “p ‘hello world!’” ΛόΠτίʔυʹมͯ͠
ϩʔυ͠
3. mruby ͷόΠτίʔυ໋ྩʹै࣮ͬͯߦ͢Δ
ͱ͍͏ͷͰͳ͍͔ͱ͍͏ਪଌ
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ͭ·Γ
mrb_load_string(mrb, “p ‘hello world!’”)
1. mruby VM Λද͢ mrb ʹ
2. “p ‘hello world!’” ΛόΠτίʔυʹมͯ͠
ϩʔυ͠
3. mruby ͷόΠτίʔυ໋ྩʹै࣮ͬͯߦ͢Δ
ͱ͍͏ͷͰͳ͍͔ͱ͍͏ਪଌ
→ Ruby ϓϩάϥϜͷίϯύΠϧͱ࣮ߦ
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·ͱΊ
• Hello World ͰϋοΫ͢ΔͱԞ͕ਂ͍
• Ruby ͷ YARV ࣅͨΑ͏ͳײ͡ʁ
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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠