PHPerKaigi 2019

Transcript

1. PHP Ͱ JVM ʹೖ໳͢Δ
   - ༧උ஌ࣝฤ -
   PHPerKaigi 2019
   2019/03/29
   Ί΋Γʔ(@m3m0r7)
   લ
   ࠲
   

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2. ͩΕʁ
   Ί΋Γʔ(@m3m0r7) Ͱ͢ɻ
   
   ը૾͸ ϋϜελʔքͷఱ࢖ Lily ͪΌΜͰ͢ɻ
   
   ϫλγϋϐʔΤΠνϐʔνϣοτσΩϧ
   
   גࣜձࣾ GameWith ͱ͍͏ձࣾͰಇ͍ͯ·͢ɻ
   

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3. ༧උ஌ࣝฤͰ࿩͢͜ͱ
   લ
   ࠲
   

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4. ༧උ஌ࣝฤͰ࿩͢͜ͱ
   • 16ਐ਺ͷܭࢉํ๏ʹ͍ͭͯ
   • signed / unsgined ͳܕʹ͍ͭͯ
   • double ΍ float ͳͲͷුಈখ਺఺ͷܭࢉํ๏ʹ͍ͭͯ
   • ΤϯσΟΞϯʹ͍ͭͯ
   

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5. 16 ਐ਺ͷܭࢉํ๏
   લ
   ࠲
   

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6. ܭࢉํ๏͝ଘ஌ͷํ✋
   લ
   ࠲
   

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7. ͦ͏Ͱ͢Ͷɺ dechex / hexdec /
   base_convert ؔ਺Ͱ͢
   લ
   ࠲
   

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8. ৑ஊͰ͢
   લ
   ࠲
   

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9. 16ਐ਺ͷܭࢉํ๏
   • 10ਐ਺͔Β16ਐ਺ͷܭࢉํ๏͸Լهͷࣜʹ౰ͯ͸ΊΒΕ·͢
   0xFF = (16 - 1) * 16^1 + (16 - 1) * 16^0 = 255(10)
   1ܻ໨͔Βܻ਺͕૿͑Δͨͼʹ1৐,2৐…N৐ͱ૿͍͖͑ͯ·͢ɻͭ·Γɺ0xFFFFͷ
   ৔߹͸ԼهͷΑ͏ʹͳΓ·͢ɻ
   0xFFFF
   = (16 - 1) * 16^3 +(16 - 1) * 16^2 + (16 - 1) * 16^1 +
   (16 - 1) * 16^0
   = 65535(10)
   16͔Β1ΛҾ͍͍ͯΔͷ͸ɺ։࢝͢Δ਺ࣈ͕0͔Β࢝·ΔͨΊͰ͢ɻA͸10, B͸
   11, … F͸15ͱ֮͑ͯ͠·͍·͠ΐ͏ɻ
   

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10. 16ਐ਺ͷܭࢉํ๏
    • PHPͰܭࢉ͢Δʹ͸ʁ
    ͜Μͳܭࢉਖ਼௚΍Γͨ͘ͳ͍ɻϓϩάϥϚςΟοΫʹղܾͰ͖ΔͳΒղܾ͢Δʹӽ
    ͨ͜͠ͱ͸ͳ͍Ͱ͢ɻ
    • 10ਐ਺͔Β16ਐ਺ʹ͢Δ
    = dechex(255) ?>
    • 16ਐ਺͔Β10ਐ਺ʹ͢Δ
    = hexdec(‘0xFF’) ?>
    = base_convert(255, 10, 16) ?>
    = base_convert(‘0xFF’, 16, 10) ?>
    

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11. ͱͬͯ΋؆୯Ͱ͢Ͷ
    લ
    ࠲
    

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12. signed / unsigned ͳܕʹ͍ͭͯ
    લ
    ࠲
    

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13. ͱ͜ΖͰɺPHPer ͷΈͳ͞Μ͕
    ͝ଘ஌ͷܕ͸ԿͰ͠ΐ͏͔
    લ
    ࠲
    

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14. JVM Ͱ͸ܕ͕૿͑·͢
    લ
    ࠲
    

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15. PHP͔Βݟͯ૿͑ͨܕ
    • boolean
    • int (4 byte)
    • string
    • float
    • ࣮࣭ float ͷ double
    • byte (1 byte)
    • short (2 byte)
    • long (8 byte)
    • Ψν float (4 byte, ୯ਫ਼౓ුಈখ਺఺਺)
    • Ψν double (8 byte, ഒਫ਼౓ුಈখ਺఺਺)
    

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16. ଟݴޠΛѻͬͨ͜ͱͳ͍ํ͸
    ೃછΈ͕ͳ͍͔΋͠Ε·ͤΜ
    લ
    ࠲
    

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17. JVM ্ͷ֤ܕʹ͍ͭͯ
    લ
    ࠲
    

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18. ֤ܕʹ͍ͭͯ - byte
    • signed byte (ූ߸෇͖ byte)
    • -128(10) ʙ 127(10) ͕ ූ߸෇͖ byte ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x00 ʙ 0xFF ·ͰͰ͢ɻ
    • ਖ਼ͷ਺͸ 0x00ʙ0x7F, ෛͷ਺͸ 0x80 ʙ 0xFF ͱͳΓ·͢ɻ
    • unsigned byte (ූ߸ͳ͠ byte)
    • 0(10) ʙ 255(10) ͕ූ߸ͳ͠ byte ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x00 ʙ 0xFF ·ͰͰ͢
    • ਖ਼ͷ਺ͷΈͰ͢ɻ
    

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19. ֤ܕʹ͍ͭͯ - short
    • signed short (ූ߸෇͖ short)
    • -32768(10) ʙ 32767(10) ͕ ූ߸෇͖ short ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x0000 ʙ 0xFFFF ·ͰͰ͢ɻ
    • ਖ਼ͷ਺͸ 0x0000ʙ0x7FFF, ෛͷ਺͸ 0x8000 ʙ 0xFFFF ͱͳΓ·͢ɻ
    • unsigned short (ූ߸ͳ͠ short)
    • 0(10) ʙ 65535(10) ͕ූ߸ͳ͠ short ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x0000 ʙ 0xFFFF ·ͰͰ͢
    • ਖ਼ͷ਺ͷΈͰ͢ɻ
    

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20. ֤ܕʹ͍ͭͯ - int
    • signed int (ූ߸෇͖ int)
    • -2147483648(10) ʙ 2147483647(10) ͕ ූ߸෇͖ int ͷൣғͱͳΓ·
    ͢ɻ
    • 16ਐ਺Ͱ͸ 0x000000 ʙ 0xFFFFFF ·ͰͰ͢ɻ
    • ਖ਼ͷ਺͸ 0x000000ʙ0x7FFFFF, ෛͷ਺͸ 0x800000 ʙ 0xFFFFFF ͱͳ
    Γ·͢ɻ
    • unsigned int (ූ߸ͳ͠ int)
    • 0(10) ʙ 4294967295(10) ͕ූ߸ͳ͠ int ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x000000 ʙ 0xFFFFFF ·ͰͰ͢
    • ਖ਼ͷ਺ͷΈͰ͢ɻ
    

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21. ֤ܕʹ͍ͭͯ - long
    • signed long (ූ߸෇͖ long)
    • -9223372036854775808(10) ʙ 9223372036854775807(10) ͕ ූ߸෇͖
    long ͷൣғͱͳΓ·͢ɻ
    • 16ਐ਺Ͱ͸ 0x00000000 ʙ 0xFFFFFFFF ·ͰͰ͢ɻ
    • ਖ਼ͷ਺͸ 0x00000000ʙ0x7FFFFFFF, ෛͷ਺͸ 0x80000000 ʙ
    0xFFFFFFFF ͱͳΓ·͢ɻ
    • unsigned long (ූ߸ͳ͠ long)
    • 0(10) ʙ 18446744073709551615(10) ͕ූ߸ͳ͠ long ͷൣғͱͳΓ·
    ͢ɻ
    • 16ਐ਺Ͱ͸ 0x00000000 ʙ 0xFFFFFFFF ·ͰͰ͢
    • ਖ਼ͷ਺ͷΈͰ͢ɻ
    

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22. ͓ؾ͖ͮͷํ΋͍Δ͔΋஌Ε·ͤΜ
    લ
    ࠲
    

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23. ͦ͏ɺPHP Ͱ͸ܭࢉͰ͖ͳ͍਺ࣈ͕
    ؚ·Ε͍ͯΔͷͰ͢
    લ
    ࠲
    

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24. Ͱ΋େৎ෉
    લ
    ࠲
    

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25. ͦ͏ gmp ؔ਺ͳΒͶ
    લ
    ࠲
    

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26. PHP ͰܭࢉͰ͖ͳ͍஋Λܭࢉ͢Δ
    • PHP Ͱ͸ unsigned long ͷ஋ΛܭࢉͰ͖ͳ͍͕ɺ gmpؔ਺
    Ͱܭࢉͤ͞Δ͜ͱ͸Մೳɻྫ͑͹
    = gmp_strval(gmp_add(PHP_INT_MAX, PHP_INT_MAX));" ?>
    • ݁Ռ͸ 18446744073709551614 ͱͳΓ·͢
    

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27. ුಈখ਺఺ͷܭࢉʹ͍ͭͯ
    લ
    ࠲
    

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28. ܭࢉํ๏͝ଘ஌ͷํ✋
    લ
    ࠲
    

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29. ͪͳΈʹɺࢲ͸ۤखͰ͢
    લ
    ࠲
    

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30. ͋ͱɺຊฤͰ͸࢖Θͳ͍ͷͰ༨ஊͱͯ͠
    ָ͓͠Έ͍ͩ͘͞
    લ
    ࠲
    

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31. ුಈখ਺఺ͷܭࢉํ๏
    • ුಈখ਺఺ͷܭࢉํ๏Ͱ༗໊ॴ͸Լه͔ͱࢥ͍·͢ɻ
    • ୯ਫ਼౓ුಈখ਺఺਺
    • ഒਫ਼౓ුಈখ਺఺਺
    • ͪͳΈʹ͜ΕΒ͸ IEEE754 Ͱఆٛ͞Ε͍ͯΔͷͰৄ͘͠஌Γ
    ͍ͨํ͸ޚཡ͍ͩ͘͞ɻ
    • ୯ਫ਼౓ුಈখ਺఺਺͸ 32 Ϗοτ (4 byte) ഒਫ਼౓ුಈখ਺఺਺
    ͸ 64 Ϗοτ (8 byte) ͷදݱ෯ͷҧ͍͕͋Γ·͢ɻ
    ࢀরɿhttps://ja.wikipedia.org/wiki/IEEE_754
    ը૾ʹ͍ͭͯɿhttps://creativecommons.org/licenses/by-sa/3.0/
    

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32. ුಈখ਺఺ͷܭࢉํ๏
    • ୯ਫ਼౓ුಈখ਺఺਺ (float) ͷܭࢉํ๏
    • sign ͕ූ߸ͱͳΓ·͢ɻ (sͱஔ͖·͢)
    
    • exponent ͕ࢦ਺෦ͱͳΓ·͢ɻ (e ͱஔ͖·͢)
    
    • fraction ͕Ծ਺෦ͱͳΓ·͢ɻ (f ͱஔ͖·͢ɻ)
    ࢀরɿhttps://ja.wikipedia.org/wiki/IEEE_754
    ը૾ʹ͍ͭͯɿhttps://creativecommons.org/licenses/by-sa/3.0/
    ୯ਫ਼౓ුಈখ਺఺਺ͷܭࢉࣜ͸
    = s * f * 2^(e - 127)
    

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33. ුಈখ਺఺ͷܭࢉํ๏
    • ഒਫ਼౓ුಈখ਺఺਺ (double) ͷܭࢉํ๏
    • جຊతʹ͸୯ਫ਼౓ුಈখ਺఺਺ͱมΘΓ·ͤΜɻ
    
    • sign ͕ූ߸ͱͳΓ·͢ɻ (sͱஔ͖·͢)
    
    • exponent ͕ࢦ਺෦ͱͳΓ·͢ɻ (e ͱஔ͖·͢)
    
    • fraction ͕Ծ਺෦ͱͳΓ·͢ɻ (f ͱஔ͖·͢ɻ)
    ࢀরɿhttps://ja.wikipedia.org/wiki/IEEE_754
    ը૾ʹ͍ͭͯɿhttps://creativecommons.org/licenses/by-sa/3.0/
    ഒਫ਼౓ුಈখ਺఺਺ͷܭࢉࣜ͸
    = s * f * 2^(e - 1023)
    

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34. ͕͔ͩ͠͠
    લ
    ࠲
    

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35. JVM ্ͩͱҧ͏ΜͰ͢
    લ
    ࠲
    

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36. ුಈখ਺఺ͷܭࢉํ๏
    • JVM্ʹ͓͚Δ୯ਫ਼౓ුಈখ਺఺਺ͷܭࢉํ๏͸Լهͷ௨Γ
    • JVM্ʹ͓͚Δഒਫ਼౓ුಈখ਺఺਺ͷܭࢉํ๏͸Լهͷ௨Γ
    • ࢦ਺෦ͷϚεΫ͍ͯ͠Δ஋͕ҟͳΓ·͢ɻ
    = s * f * 2^(e - 1075)
    = s * f * 2^(e - 150)
    

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37. ΤϯσΟΞϯʹ͍ͭͯ
    લ
    ࠲
    

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38. ΤϯσΟΞϯͱ͍͏ݴ༿Λ
    ஌͍ͬͯΔํ✋
    લ
    ࠲
    

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39. ΤϯσΟΞϯʹ͍ͭͯ
    • ΤϯσΟΞϯ͸ओʹ2ͭ͋Γ·͢
    • ϦτϧΤϯσΟΞϯ
    • ϏοάΤϯσΟΞϯ
    • ϦτϧΤϯσΟΞϯ͸ӈ͔Βࠨ΁ɺϏοάΤϯσΟΞϯ͸ࠨ
    ͔Βӈ΁ಡΉͱ֮͑Ε͹େৎ෉Ͱ͢ɻ
    

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40. ͪͳΈʹϛυϧΤϯσΟΞϯͱ͍͏ͷ΋
    ͋ΔΒ͍͠
    લ
    ࠲
    

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41. ࢀরɿhttps://ja.wikipedia.org/wiki/
    %E3%82%A8%E3%83%B3%E3%83%87%E3%82%A3%E3%82%A2%E3%83%B3
    

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42. ࢀরɿhttps://ja.wikipedia.org/wiki/
    %E3%82%A8%E3%83%B3%E3%83%87%E3%82%A3%E3%82%A2%E3%83%B3
    

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43. มͳ΋ͷͩͦ͏Ͱ͢
    લ
    ࠲
    

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44. ϦτϧΤϯσΟΞϯʹ͍ͭͯ
    લ
    ࠲
    

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45. ϦτϧΤϯσΟΞϯʹ͍ͭͯ
    • ϦτϧΤϯσΟΞϯͷಈ͖͸ԼهͷΑ͏ʹϝϞϦʹੵ·Εͯ
    ͍͖·͢
    00 AA BB CC DD
    Ϩδελ
    DD CC
    ϝϞϦ
    0xA
    ΞυϨε 0xB 0xC 0xD 0xE
    

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46. ϏοάΤϯσΟΞϯʹ͍ͭͯ
    લ
    ࠲
    

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47. ϏοάΤϯσΟΞϯʹ͍ͭͯ
    • ϏοάΤϯσΟΞϯͷಈ͖͸ԼهͷΑ͏ʹϝϞϦʹੵ·Εͯ
    ͍͖·͢
    00 AA BB CC DD
    Ϩδελ
    CC DD
    ϝϞϦ
    0xA
    ΞυϨε 0xB 0xC 0xD 0xE
    

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48. ͓͞Β͍
    લ
    ࠲
    

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49. ͓͞Β͍
    •gmp_* ؔ਺Λ֮͑ͯؼΖ͏
    •dechex / hexdec / base_convert ؔ਺Λ֮͑ͯ
    ؼΖ͏
    •signed, unsigned ͳ஋ʹ͍֮ͭͯ͑ͯؼΖ͏
    •ුಈখ਺఺ͷܭࢉํ๏Λ֮͑ͯؼΖ͏
    •ΤϯσΟΞϯʹ͍֮ͭͯ͑ͯؼΖ͏
    

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50. લ࠲͸ऴྃͰ͢
    લ
    ࠲
    

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51. ͋ͳͨ͸஌͍ͬͯΔͩΖ͏͔
    ຊ
    ฤ
    

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52. 30 ԯͷσόΠεͰ૸ΔϠπͷ͜ͱΛ…
    ຊ
    ฤ
    

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53. ͦ͏ Java ͷ͜ͱΛ…
    ຊ
    ฤ
    

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54. ͦ͏ Java ͷ͜ͱΛ…
    PHP
    ຊ
    ฤ
    

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55. PHP Ͱ JVM ʹೖ໳͢Δ
    - ຊฤ -
    ຊ
    ฤ
    PHPerKaigi 2019
    2019/03/29
    Ί΋Γʔ(@m3m0r7)
    

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56. ͩΕʁ
    Ί΋Γʔ(@m3m0r7)
    
    ϫλγϋϐʔΤΠνϐʔνϣοτσΩϧ
    
    גࣜձࣾ GameWith ͱ͍͏ձࣾͰಇ͍ͯ·͢ɻ
    

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57. PHP ͰόΠφϦϦʔσΟϯά
    

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58. ΍ΓํΛ͝ଘ஌ͷํ✋
    

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59. ͦ΋ͦ΋ɺόΠφϦϦʔσΟϯάͱ͸ʁ
    

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62. ੺࿮ͷͱ͜ΖΛಡΜͰ͍͘͜ͱͰ͢
    

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63. ͦ΋ͦ΋ɺPHP Ͱ JVM Λ
    ಡΜͰԿָ͕͍͠ͷʁ
    

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64. PHP Ͱ JVM ΛಡΜͰԿָ͕͍͠ͷ͔
    • ελοΫϚγϯ͕ͲͷΑ͏ʹಈ͍ͯΔ͔ཧղ͢Δ͜ͱ͕Ͱ͖
    ͨؾ࣋ͪʹͳΔ
    • ͨͩ͠ JVM ͸ϩʔΧϧม਺ͷετΞ΍ϩʔυ͕ແݶେʹͰ
    ͖ΔͨΊ७ਮͳελοΫϚγϯͰ͸ͳ͍
    • php ͷதؒίʔυ͕ཧղ͠΍͘͢ͳΔ
    • vld extension ͷؾ࣋ͪʹͳΕΔ
    • 30 ԯͷσόΠεͰ૸Δ͜ͱ͕Ͱ͖Δ
    • ͳΜͳΒ PHP ͕Քಇ͍ͯ͠Δαʔόʔ୆਺෼΋ؚΊΔͱ
    Java ΑΓ΋͍͢͝ͷͰ͸
    

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65. PHP
    Java
    

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66. ৑ஊͰ͢
    

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67. JVM Λೖ໳͢Δʹ͋ͨͬͯ
    

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69. The Java® Virtual Machine Specification
    ΋ҰॹʹಡΜͰ͍͖·͢
    

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70. The Java® Virtual Machine Specification
    https://docs.oracle.com/javase/specs/jvms/se11/html/index.html
    

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71. ͬͦ͘͞όΠφϦϦʔσΟϯά͠·͢
    

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72. Java ͷΫϥεϑΝΠϧ͸͜ͷߏ଄
    

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73. View Slide

74. ಡΈํ
    

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75. unsigned int
    unsigned short
    object (PHPͩͬͨΒ഑ྻͰOK)
    

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76. ࣮ࡍʹ PHP ͰಡΜͰ͍͘
    

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77. όΠφϦΛಡΉʹ͸
    • PHPͷϑΝΠϧؔ਺Λ࢖͏
    • fopen ؔ਺
    • fread ؔ਺
    • fseek ؔ਺
    • int ΍ short ͳͲͷ஋Λܭࢉ͢Δ
    • base_convert ؔ਺
    • pack / unpack ؔ਺ (ࠓճ͸͜ΕΛ࢖͍·͢)
    • ord / chr ؔ਺
    • ؾ߹
    

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78. unsigned int
    magic
    unsigned short
    minor version
    unsigned short
    major version
    unsigned short
    constant pool count
    

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79. PHP Ͱද͢ͱ
    

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81. N ͸ unsigned int Ͱ
    ϏοάΤϯσΟΞϯ
    όΠτΦʔμʔ
    n ͸ unsigned short Ͱ
    ϏοάΤϯσΟΞϯ
    όΠτΦʔμʔ
    cafebabe
    0
    52 (JDK 8)
    29
    ͜͜Ͱ͍͏ int (4byte) ΍ short (2byte) ͷαΠζ͸ JVM ্Ͱͷ࿩ʹͳΓ·͢ɻ
    

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82. Ͷʁ؆୯Ͱ͠ΐʁ
    

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83. औಘͨ͠ constant_pool_count ΑΓ
    Constant Pool Λऔಘ͠·͢
    

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84. ੺࿮͕ constant pool
    

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85. PHP Ͱද͢ͱ
    

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88. ଴ͯΑ
    

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89. ʁʁʁ
    ʁʁʁ
    ʁʁʁ
    ʁʁʁ
    

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90. 0x0A ΍ 0x09 ͷ஋ͬͯʁ
    

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92. Constant Kind ͱ Tag ͷ͜ͱΛ
    ͍ࣔͯ͠·͢
    unsigned byte
    

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93. ͭ·Γ Constant Kind ͷ Tag ͷ
    ஋ʹΑͬͯॲཧͷ࢓ํ͕
    มΘΓ·͢
    

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94. ॲཧͷํ๏͕ҟͳΔ
    • ࠓճ͸ Methodref (0x0A), Fieldref (0x09), String (0x08),
    Class (0x07), Utf8 (0x01), NameAndType(0x0C) ͷ6ͭͷΈ
    ରԠɻ
    Constant Kind Tag Read bytes
    CONSTANT_Methodref 0x0A
    2 byte + 2 byte
    
    ( unsigned short + unsigned short )
    CONSTANT_Fieldref 0x09
    2 byte + 2 byte
    
    ( unsigned short + unsigned short )
    CONSTANT_String 0x08
    2 byte
    
    ( unsigned short )
    CONSTANT_Class 0x07
    2 byte
    
    ( unsigned short )
    CONSTANT_Utf8 0x01
    ( length = 2 byte ) + length bytes
    
    ( unsigned short + length bytes )
    CONSTANT_NameAndType 0x0C
    2 byte + 2 byte
    
    ( unsigned byte + unsigned byte )
    

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95. ͜ΕΛ΋ͱʹͯ͠…
    

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96. C ͸ unsigned byte
    constant pool count ͸ྺ࢙తͳ
    ཧ༝ʹΑΓ -1 ͢Δ
    CONSTANT_Methodref
    CONSTANT_Fieldref
    CONSTANT_String
    CONSTANT_Class
    

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97. CONSTANT_Utf8
    CONSTANT_NameAndType
    औಘͨ݁͠ՌΛ֨ೲ͢Δ
    

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98. ࣮ࡍʹग़ྗͯ͠ΈΔͱͲ͏ͳΔ͔ʁ
    

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99. View Slide

100. ͦΕͬΆ͍ͷ͕ݟ͑ͯ͘Δ
     

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101. ✌(‘ω'✌ )ࡾ✌('ω')✌ࡾ( ✌’ω’)✌
     ָ͍͠ !!!
     

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102. Ҿ͖ଓ͖ಡΜͰ͍͖·͢
     

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103. View Slide

104. unsigned short
     access flag
     unsigned short
     this class
     unsigned short
     super class
     unsigned short
     interface count
     unsigned short
     fields count
     unsigned short
     methods count
     

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105. PHP Ͱද͢ͱ
     

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106. View Slide

107. 32 (ACC_SUPER)
     Test
     java/lang/Object
     0 (ΠϯλϑΣʔε͸ఆٛ͞Ε͍ͯͳ͍ͨΊ)
     0 (ϑΟʔϧυ͸ఆٛ͞Ε͍ͯͳ͍ͨΊ)
     2 ( ͱ main ͕ఆٛ͞Ε͍ͯΔͨΊ)
     

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108. ϝιου͕ 2 ͭ͋ΔͷͰ
     ಡΜͰ͍͖·͢
     

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109. View Slide

110. unsigned short
     unsigned short
     unsigned short
     unsigned short
     ϝιουʹ͸ Code Attribute ؚ͕·ΕΔ
     ʢͦΕҎ֎΋ؚ·Ε·͕͢লུ͠·͢ʣ
     

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111. Code Attribute ͷߏ଄͸ʁ
     

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112. View Slide

113. unsigned short
     length byte
     unsigned int
     Code Attribute ʹ͸ LineNumberTable Attribute
     ؚ͕·Ε·͢
     ʢͦΕҎ֎΋ؚ·Ε·͕͢লུ͠·͢ʣ
     

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114. LineNumberTable Attribute ͷߏ଄͸ʁ
     

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115. View Slide

116. unsigned short
     unsigned int
     

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117. View Slide

118. ੺࿮͕ϝιουͷ৘ใͱ
     JVM ͷίʔυͷ৘ใʹͳΓ·͢
     

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119. PHP Ͱද͢ͱ
     

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120. View Slide

121. View Slide

122. View Slide

123. ࣮ࡍͷ JVM ্ͷίʔυ͕֨ೲ͞Ε͍ͯ·͢
     Attribute ͷछྨʹΑΓॲཧํ๏͕ҟͳΔͨΊ
     ෼ذ͍ͯ͠·͢
     ࠶ؼ͢Δඞཁ͕͋ΔͷͰؔ਺Խͯ͠·͢
     

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124. Attribute ͷछྨʹΑΓॲཧํ๏͕ҟͳΔͨΊ
     ෼ذ͍ͯ͠·͢
     ࠶ؼͰॲཧ͍ͯ͠·͢
     

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125. 0 (ϝιου΁ͷΞΫηεݖΛ͍ࣔͯ͠·͢)
     , mainͳͲͷϝιου໊
     ()V, ([Ljava/lang/String;)VͳͲͷ
     ϝιουͷҾ਺ͷ৘ใ
     Code Attribute ͳͲͷ৘ใ
     

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126. ࣮ࡍʹग़ྗͯ͠ΈΔͱʁ
     

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127. View Slide

128. ͍͍ײ͡ʹऔΕ͖ͯ·ͨ͠
     

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129. ϥετεύʔτ
     

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130. ࠷ޙ͸ Ϋϥεͷ Attribute Λऔಘ͢Δ
     

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131. ClassFile Structure ʹ͸ SourceFile Attribute ͕
     ؚ·Ε·͢
     ʢͦΕҎ֎΋ؚ·Ε·͕͢লུ͠·͢ʣ
     

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132. SourceFile Attribute ͷߏ଄͸ʁ
     

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133. View Slide

134. View Slide

135. unsigned short
     attribute count
     unsigned short
     attribute name index
     unsigned int
     attribute length
     unsigned short
     sourcefile index
     

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136. PHP Ͱද͢ͱ
     

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137. View Slide

138. View Slide

139. readAttributeؔ਺ʹ SourceFile Λ௥Ճ
     

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140. ϝιουͱಉ͡Α͏ͳॲཧΛॻ͘
     

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141. Ҏ্Ͱ JVM ೖ໳׬ྃͰ͢
     

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142. 30ԯͷσόΠεͰ૸Δ Java ͷ
     ؾ࣋ͪʹͳΕ·͔ͨ͠ʁ
     PHP
     

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143. ࣍ճ
     

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144. PHP Ͱ JVM Λಈ͔͢
     χʔϞχοΫͱ͸
     Operation Code ͱ͸
     iload_0 ͬͯͳΜͩ…
     tableswitch ͱ lookupswitch ͷҧ͍
     Φϖϥϯυ
     ϩʔΧϧετϨʔδ
     invokespecial ͱ invokevirtual
     ಥવͷ
     ͳͥ PHP Ͱ΍ΔΜͩ…
     

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145. ָ͓͠Έʹʂ
     ※͓࿩͢Δ৔ॴ͸ܾ·ͬͯ·ͤΜ
     ※͓࿩͢Δ͜ͱࣗମܾ·ͬͯ·ͤΜ
     

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146. View Slide

147. ͜ͷ೔ͷͨΊʹɺେྔͷ࣮૷ͱ
     ϦϑΝΫλϦϯάΛ͖ͯ͠·ͨ͠
     

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148. JAR ͷରԠ, ΞϊςʔγϣϯͷରԠ, ֎෦Ϋϥε
     ͷରԠ ͳͲͳͲ…
     

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149. View Slide

150. View Slide

151. View Slide

152. Before
     

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153. Before
     ʊਓਓਓਓਓਓʊ
     ʼɹ.DS_Storeɹʻ
     ʉY^Y^Y^Y^Y^Y^ʉ
     ʊਓਓਓਓਓਓʊ
     ʼɹnbprojectɹʻ
     ʉY^Y^Y^Y^Y^Y^ʉ
     ʊਓਓਓਓʊ
     ʼɹ4೥લɹʻ
     ʉY^Y^Y^Y^ʉ
     

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154. 20ࡀͷͱ͖ʹ͜Εॻ͍ͨͷ͔…
     

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155. After
     

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156. After
     PHPUnit Ͱςετ
     composer ରԠ
     PHP CodeSniffer ͰίʔσΟϯάϧʔϧΛ౷Ұ
     TravisCIͰςετΛ୲อ
     

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157. ϞμϯʹͳΓ·ͨ͠
     

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158. DEMO
     (͕࣌ؒ͋Ε͹)
     

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159. php-java ͱ͍͏໊લͰ JVM ΤϛϡϨʔλΛެ։͍ͯ͠·͢
     ͥͻࣗ͝਎ͷ PC Ͱࢼͯ͠Έ͍ͯͩ͘͞
     ͦͯ͠ίϯτϦϏϡʔλʹͳ͍ͬͯͩ͘͞ʂʂ
     https://github.com/memory-agape/php-java
     

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160. ຊ೔ͷαϯϓϧ͸ͪ͜Β
     https://gist.github.com/memory-agape/
     6d4dce2af4ece6e41293afb4e2caa5e1
     

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161. THANK YOU FOR YOUR LISTENING
     

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