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monochromegane/go-code-embedding ࡾ୐༔հ / Pepabo R&D Institute, GMO Pepabo, Inc. 2021.06.10 Fukuoka.go#17 go:embedͰ Explainable BinaryΛ࡞Δ

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1SJODJQBMFOHJOFFS :VTVLF.*:",&!NPOPDISPNFHBOF 1FQBCP3%*OTUJUVUF (.01FQBCP *OD IUUQTCMPHNPOPDISPNFHBOFDPN

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1. എܠ: Binaryͷઆ໌ੑ 2. ՝୊: Explainable Binaryʹ޲͚ͨैདྷͷऔΓ૊Έ 3. ఏҊ: go:embedΛ༻͍ͨExplainable Binary 4. ·ͱΊ 3 ໨࣍

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1. എܠ Binaryͷઆ໌ੑ

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• Goݴޠ࣮૷ͷϓϩμΫτ͸όΠφϦܗࣜʹΑΔ഑෍͕Մೳ • όΠφϦ୯ମ͔Β͸ʢ࢓༷ʹਫ਼௨্ͨ͠Ͱղੳ͠ͳ͚Ε͹ʣਖ਼֬ͳڍಈ͸೺Ѳ Ͱ͖ͳ͍ • go:embedͷಋೖʹΑͬͯΞηοτ΋όΠφϦʹؚ·ΕΔΑ͏ʹͳΔ 5 ͸͡Ίʹ • ར༻͢ΔϓϩμΫτͷόΠφϦͷڍಈΛ೺Ѳ͢Δ͜ͱ͕ॏཁͰ͋Δɻ • → ຊใࠂͰ͸͜ͷ఺ΛɺόΠφϦͷઆ໌ੑʢExplainabilityʣͱͯ͠࿦͡Δ

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2. ՝୊ Explainable Binaryʹ޲͚ͨैདྷͷऔ૊

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• όΠφϦͱιʔείʔυΛඥ෇͚Δ͜ͱͰઆ໌ੑΛ֬อ͢Δ • Կ΋ࡦΛߨ͡ͳ͚Ε͹ɺόΠφϦ͸ιʔείʔυͱඥ෇͔ͳ͍ • ιʔείʔυ΋ߋ৽͞ΕΔ • ϓϩμΫτͰಠࣗʹ࠾൪ͨ͠όʔδϣϯ൪߸Λදࣔ͢Δ • mybinary -v • VCSͷϦϏδϣϯ൪߸ΛϏϧυ࣌ʹຒΊࠐΉ • go build —ldflag “-X …” 7 ैདྷͷऔ૊ $ myapp -v $ go build --ldflag “-X …”

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• Ϗϧυϓϩηεͱͷဃ཭ʢ௥Ճ͞ΕͨॴఆϏϧυϓϩηεͷεΩοϓʣ • όʔδϣϯΛߋ৽͢ΔɺϦϏδϣϯΛຒΊࠐΉϓϩηε͸εΩοϓՄೳͳͨ ΊɺಉҰͷ஋Ͱ͋ͬͯ΋ಈ࡞ͷҟͳΔόΠφϦΛ࡞Εͯ͠·͏ • ϦϙδτϦ΍ϦϏδϣϯͷফࣦ • ϦϙδτϦ΍ಛఆϦϏδϣϯ͕Ӭଓతʹଘࡏ͢Δ͜ͱ͸อূͰ͖ͳ͍ • ྫ: mimemagic (Your bundle is locked to mimemagic (0.3.5), but that version could not be found) 8 ैདྷͷऔ૊ͷݒ೦఺

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3. ఏҊ go:embedΛ༻͍ͨExplainable Binary

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• ॴఆͷ௥ՃϏϧυϓϩηεΛεΩοϓͯ͠΋ιʔείʔυͱဃ཭͠ͳ͍ • → ɹ • ϦϙδτϦ΍ಛఆϦϏδϣϯ͕ফࣦͯ͠΋ιʔείʔυΛࢀরͰ͖Δ • → 10 ݒ೦఺Λղফͨ͠όΠφϦ

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• ॴఆͷ௥ՃϏϧυϓϩηεΛεΩοϓͯ͠΋ιʔείʔυͱဃ཭͠ͳ͍ • → go build (without ldflag) ͚ͩͰඞ࣮ͣߦ͞ΕΔϓϩηε • ϦϙδτϦ΍ಛఆϦϏδϣϯ͕ফࣦͯ͠΋ιʔείʔυΛࢀরͰ͖Δ • → 11 ݒ೦఺Λղফͨ͠όΠφϦ

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• ॴఆͷ௥ՃϏϧυϓϩηεΛεΩοϓͯ͠΋ιʔείʔυͱဃ཭͠ͳ͍ • → go build (without ldflag) ͚ͩͰඞ࣮ͣߦ͞ΕΔϓϩηε • ϦϙδτϦ΍ಛఆϦϏδϣϯ͕ফࣦͯ͠΋ιʔείʔυΛࢀরͰ͖Δ • → ιʔείʔυࣗମΛόΠφϦʹ಺แ͢Δ 12 ݒ೦఺Λղফͨ͠όΠφϦ

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• ॴఆͷ௥ՃϏϧυϓϩηεΛεΩοϓͯ͠΋ιʔείʔυͱဃ཭͠ͳ͍ • → go build (without ldflag) ͚ͩͰඞ࣮ͣߦ͞ΕΔϓϩηε • ϦϙδτϦ΍ಛఆϦϏδϣϯ͕ফࣦͯ͠΋ιʔείʔυΛࢀরͰ͖Δ • → ιʔείʔυࣗମΛόΠφϦʹ಺แ͢Δ 13 ݒ೦఺Λղফͨ͠όΠφϦ • go:embedͰόΠφϦʹιʔείʔυΛࠝแ͢Δͱ͍͏ఏҊ

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monochromegane/ go-code-embedding

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• ιʔείʔυΛόΠφϦʹ૊ΈࠐΈɺӾཡ͢ΔͨΊͷδΣωϨʔλ • ίϚϯυҰൃͰࣗ࡞ͷϓϩμΫτʹҎԼͷΞΫηαΦϓγϣϯΛ௥Ճ • ιʔείʔυදࣔͷΦϓγϣϯ • ιʔείʔυҰཡͷΦϓγϣϯ • ιʔείʔυ෮ݩͷΦϓγϣϯ 15 ػೳ # myapp --help Usage of myapp: -list-code list code -restore-code restore code -restore-path string restore code to specified path (default ".") -show-code string show specified code Usage of myapp: -output-dir string Output directory (default ".") -pkg string Package name to use in the generated code. (default "main")

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16 ࢖͍ํ

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17 ࢖͍ํ

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18 ࢓૊Έ Source code Generated code IUUQTJDPOTDPNMJDFOTF

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19 ࢓૊Έ Source code Generated code 1. go:embed directive

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20 ࢓૊Έ Source code Generated code 2. Option flags

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21 ࢓૊Έ Source code Generated code 3. Method implementations

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22 ࢓૊Έ Source code Generated code $ go build -o myapp Explainable binary -list-code list code -restore-code restore code -restore-path string restore code to specified path (default ".") -show-code string show specified code Source code

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monochromegane/ go-embedding-accessor

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• ΍Γ͔ͨͬͨ͜ͱ͸ɺ೚ҙͷ૊ΈࠐΈର৅ʹର͢ΔΞΫηαͷੜ੒ • ιʔείʔυͷ૊ΈࠐΈ͸ͦͷಛघܥͱߟ͑ͨ • → go-embedding-accessorͱ࣮ͯ͠૷ • ೚ҙͷgo:embedσΟϨΫςΟϒจࣈྻΛ౉ͯ͠ΞΫηαΛੜ੒͢Δ 24 ࣮૷ͷҰൠԽ

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• ը૾ͳͲͷΞηοτΛόΠφϦʹ૊ΈࠐΜͩࡍʹɺόΠφϦ͔Βը૾Λ෮ݩ͢ ΔΑ͏ͳϢʔεέʔεʹରԠ • go:embedͷීٴʹ൐͍ɺΞηοτ΁ͷΞΫηα͸χʔζ͕૿͢ʢ͔΋ʣ 25 ࣮૷ͷҰൠԽ

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͓·͚

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• ιʔείʔυΛόΠφϦʹಉࠝ͢ΔΞΠσΟΞ͸ࣗ਎Ͱઌߦ࣮૷͍ͯͨ͠ • ʰ໺ྑόΠφϦʹͳͬͯ΋େৎ෉ɻGoͷόΠφϦʹιʔείʔυΛఴ෇͢ ΔπʔϧΛͭͬͨ͘ɻʱ(2015.8) (*1) • monochromegane/go-bincode (*2) • ઌߦ࣮૷͸go-bindataʹґଘ͍͕ͯͨ͠ɺඪ४ͷembedػೳʹஔ͖׵͑Δ͜ ͱ͕Ͱ͖ɺ࣮૷΋γϯϓϧʹͳͬͨɻ • go:embedͷීٴ͕ݟࠐ·ΕΔ͜ͱ͔ΒɺվΊͯఏҊʢωλ੾ΕͰ͸ͳ͍ʣ 27 ࣗ਎Ͱͷઌߦ࣮૷ IUUQTCMPHNPOPDISPNFHBOFDPNCMPHHPCJODPEF IUUQTHJUIVCDPNNPOPDISPNFHBOFHPCJODPEF

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4. ·ͱΊ

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• GoόΠφϦͷઆ໌ੑʹண໨͠ɺιʔείʔυͱͷඥ෇͚ͷ՝୊Λ੔ཧͨ͠ • ࠷௿ݶͷϏϧυϓϩηεͰ͋ͬͯ΋ιʔείʔυΛಉࠝՄೳͳπʔϧͱͯ͠ go-code-embeddingΛఏҊ • go:embed΁ͷΞΫηαͷχʔζΛଊ͑ͯɺgo-embedding-accessorΛ࣮૷ ͠ɺଟ༷ͳϢʔεέʔεʹॊೈʹରԠͨ͠ • ఏҊʹΑΓɺಉࠝͨ͠ιʔείʔυ΍ΞηοτΛදࣔɺ෮ݩ͢Δɺઆ໌Մೳੑ ͕͋ΔExplainable BinaryΛఏڙͰ͖Δ 29 ·ͱΊ ࡾGo

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