WASIの話（2019 July, Emscripten & WebAssembly night !! #8 ）

Emscripten & WebAssembly night !! #8 https://emsn.connpass.com/event/136346/ での発表

1. 8"4*ʹ͍ͭͯ TBOFZVLJ@T
2. 8"4.͓͞Β͍ w ͦͦ͜͜ͷQFSGPSNBODFͰTFDVSFʹಈ͔ͤΔ
 ʢͷ͕ظ଴Ͱ͖Δʣ*4"
   w 1PSUBCMF
   
   4BOECPYͳ&YFDVUBCMFϑΥʔϚοτͱͯ͠ ͷ࠾༻ͷ֦େ
   w FH
   'BTUMZ
   5FSSBSJVN
3. 1PSUBCJMJUZ
   1SPCMFN w ϒϥ΢βҎ֎Ͱ࣮ߦ͠Α͏ͱͨ͠৔߹ɺ"1*ͷඪ४ηοτ ͕ͳ͍
   w ຒΊࠐΉଆ͕ຖճఆٛͯ͠΋͍͍͸͕ͣͩʜʜ
   w Կ΋ͳ͍ΑΓ͸͋ͬͨ΄͏͕͍͍
4. 8"4* • The WebAssembly System Interface • ϒϥ΢βͷ֎Ͱಈ͔ͨ͢ΊͷinterfaceΛఆٛ͢Δ • Mozilla + Fastly + npm + Node.jsͳ࠲૊Έ • https://hacks.mozilla.org/2019/03/standardizing-wasi-a-webassembly-system-interface/ • design͸શମతʹunstableͱڧௐ͞Ε͍ͯΔͷ͕໨ཱͭ
5. "SDIJUFDUVSF
   0WFSWJFX IUUQTSBXHJUIVCVTFSDPOUFOUDPN$SBOF4UBUJPOXBTNUJNFNBTUFSEPDTXBTJTPGUXBSFBSDIJUFDUVSFQOH
6. "#*
   VOTUBCMF w _start() w ϓϩάϥϜͷར༻͢ΔΤϯτϦʔϙΠϯτ
   w XBTNMME͕ظ଴͢ΔσϑΥϧτ໊
   w XBTNͷTUBSUηΫγϣϯ͸ॳظԽͱ॥؀ࢀরͳͲͷ໰୊Ͱ
 ݱࡏ࢖༻ͤͣ
   w memory w ϓϩάϥϜͷར༻͢ΔઢܗϝϞϦۭؒ
   w "1*ͷଟ͕͘IPTUBQQMJDBUJPOؒͰϝϞϦΛڞ༻ͯ͠Δલఏʹཱ͍ͬͯ ΔͷͰFYQPSUඞਢ
7. "1* w 104*9
   MJLF
   w ͨͩ͠NNBQͱ͔ແ͍
   w ൺֱత޿͍Ծ૝ϝϞϦΞυϨεۭؒͷཁٻʹ
 ͭͳ͕ΔͨΊ
   w TPDLFUपΓ͸ݶఆత
   w$BQBCJMJUZ
   0SJFOUFE
   %FTJHO
8. $BQBCJMJUZ
   0SJFOUFE
   %FTJHO w ແ੍ݶͳϦιʔε΁ͷΞΫηεΛڐ༰͠ͳ͍
   w 8"4*Ͱ͸$MPVE"#*
   $BQTJDVN Λయڌͱ͍ͯ͠Δ
   w pMF
   EFTDSJQUPSʹجͮ͘ΞΫηε؅ཧ
   w PQFO Ͱ͸ͳ͘PQFOBU
9. )PX
   UP
   OFUXPSLJOH w TPDLFU
   DPOOFDU
   MJTUFO ʹ૬౰͢Δ"1*͸ͳ͍ͷͰ೚ ҙͷTPDLFU௨৴࢝ΊΔͷ͸ແཧ
   • remember capability oriented design • c.f. CloudABI͸֎෦ʹconfigΛఆٛ͢Δ͜ͱͰରॲ w @@XBTJ@TPDL@SFDW ͱ@@XBTJ@TPDL@TFOE ͸͋Δ
   w 'JMF
   EFTDSJQUPS͑͞༻ҙͰ͖Ε͹ϝοηʔδΛड͚औΔ͜ͱ ͸Մೳ
10. /FUXPSL
    JNQMFNFOUBUJPO w ઐ༻ͷOFUXPSL
    MJCSBSZΛ࢖ΘͤΔ࣮૷͕ଟ͍
    w -VDFU
    w l8F
    TVQQPSU
    UIF
    FOUJSF
    8"4*
    "1*
    XJUI
    UIF
    FYDFQUJPO
    PG
    TPDLFU SFMBUFE
    TZTDBMMT
    5IFTF
    XJMM
    CF
    BEEFE
    XIFO
    OFUXPSL
    BDDFTT
    JT
    TUBOEBSEJ[FEz
    w XBTNFS
    w LFSOFMOFU
    DSBUFܦ༝Ͱݺͼग़͢
11. ·ͱΊ w XBTNॲཧܥ࡞ͬͯΔਓ͸ݟ͓͍ͯͨ΄͏͕͍͍͔΋Ͷ
    w XBTNUJNF΍XBTNFSͷFNCFEEFEͰࡁΉ৔߹͸͋Μ· Γؔ܎ͳͦ͞͏