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8"4*ʹ͍ͭͯ TBOFZVLJ@T

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8"4.͓͞Β͍ w ͦͦ͜͜ͷQFSGPSNBODFͰTFDVSFʹಈ͔ͤΔ
 ʢͷ͕ظ଴Ͱ͖Δʣ*4" w 1PSUBCMF4BOECPYͳ&YFDVUBCMFϑΥʔϚοτͱͯ͠ ͷ࠾༻ͷ֦େ w FH'BTUMZ5FSSBSJVN

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1PSUBCJMJUZ1SPCMFN w ϒϥ΢βҎ֎Ͱ࣮ߦ͠Α͏ͱͨ͠৔߹ɺ"1*ͷඪ४ηοτ ͕ͳ͍ w ຒΊࠐΉଆ͕ຖճఆٛͯ͠΋͍͍͸͕ͣͩʜʜ w Կ΋ͳ͍ΑΓ͸͋ͬͨ΄͏͕͍͍

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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໨ཱͭ

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"SDIJUFDUVSF0WFSWJFX IUUQTSBXHJUIVCVTFSDPOUFOUDPN$SBOF4UBUJPOXBTNUJNFNBTUFSEPDTXBTJTPGUXBSFBSDIJUFDUVSFQOH

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"#* 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

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"1* w 104*9MJLF w ͨͩ͠NNBQͱ͔ແ͍ w ൺֱత޿͍Ծ૝ϝϞϦΞυϨεۭؒͷཁٻʹ
 ͭͳ͕ΔͨΊ w TPDLFUपΓ͸ݶఆత w$BQBCJMJUZ0SJFOUFE%FTJHO

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$BQBCJMJUZ0SJFOUFE%FTJHO w ແ੍ݶͳϦιʔε΁ͷΞΫηεΛڐ༰͠ͳ͍ w 8"4*Ͱ͸$MPVE"#* $BQTJDVN Λయڌͱ͍ͯ͠Δ w pMFEFTDSJQUPSʹجͮ͘ΞΫηε؅ཧ w PQFO Ͱ͸ͳ͘PQFOBU

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)PXUPOFUXPSLJOH 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 'JMFEFTDSJQUPS͑͞༻ҙͰ͖Ε͹ϝοηʔδΛड͚औΔ͜ͱ ͸Մೳ

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/FUXPSLJNQMFNFOUBUJPO w ઐ༻ͷOFUXPSLMJCSBSZΛ࢖ΘͤΔ࣮૷͕ଟ͍ w -VDFU w l8FTVQQPSUUIFFOUJSF8"4*"1* XJUIUIFFYDFQUJPOPGTPDLFU SFMBUFETZTDBMMT5IFTFXJMMCFBEEFEXIFOOFUXPSLBDDFTTJT TUBOEBSEJ[FEz w XBTNFS w LFSOFMOFUDSBUFܦ༝Ͱݺͼग़͢

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·ͱΊ w XBTNॲཧܥ࡞ͬͯΔਓ͸ݟ͓͍ͯͨ΄͏͕͍͍͔΋Ͷ w XBTNUJNF΍XBTNFSͷFNCFEEFEͰࡁΉ৔߹͸͋Μ· Γؔ܎ͳͦ͞͏