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安全に失敗するための手遊び-未定義動作を引き出そう-
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Hiroaki Kawase
November 08, 2024
How-to & DIY
0
660
安全に失敗するための手遊び-未定義動作を引き出そう-
第20回FA設備技術勉強会 in TOKYOの発表内容になります.
Hiroaki Kawase
November 08, 2024
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Transcript
҆શʹࣦഊ͢ΔͨΊͷख༡ͼ -ະఆٛಈ࡞ΛҾ͖ग़ͦ͏ ୈճ'"ઃඋٕज़ษڧձJO50,:0
Ĉ ܯࠂ ຊൃද༰Λਅࣅ͢Δ͜ͱͰࣄނ͕ى͜ΔՄೳੑ ͕͋Γ·͢ɽຊൃද҆શͷͨΊͷܒ׆ಈͰ͋ Γɼൃੜͨ͠ࣄނͳΒͼʹଛࣦʹ͖ͭ·ͯ͠ Λෛ͍͔Ͷ·͢ɻ
ࣗ࡞ͩΖ͏ͱখ͔͞Ζ͏ͱػցةͳ͍ .3+8 ˍ ൶Ϣχοτ ʢϛεϛ࠷খαΠζɾ̎LHʣ ϑϧύϫʔͰͨ͠߹ɼ രԻͱڞʹక݁෦͕ ζϨͨ
݁ूதྗ͕͋Δʹະఆٛಈ࡞ΛҾ͖ىͤ͜ ηʔϑςΟͱͯ͠ αʔϘిݯःஅ ˠඵΕͯ ఀࢭʁʂ ͿͬͪΌ͚ɼٕज़ࢿྉूͷͱ͋ΔऍΛඈͨ͠ؼ݁ ͔͠͠ɼऍͷཧ༝·ͰѲͨ͠ઢܭը৽ਓʹࠔ
ةݥΛચ͍ग़͠ͳ͕ΒΈ্͍͛ͨ ʹݟ͑ΔةݥͳΒఆతͰରԠͰ͖Δɽ Ͱɼઃܭɾઢϛεؾ͍͍ͯͳ͍༷ʹΑΔةݥͲ͏͢Δʁ
Βͳ͍ةݥʔଘࡏ͠ͳ͍։ࣔ͞Εͳ͍༷ .3+˘"αʔϘΞϯϓٕज़ࢿྉूΑΓҾ༻ ऍඇৗఀࢭ &.( ͷ0''ͱಉ࣌ ʹɼ֎෦γʔέϯεʹΑΓओճ࿏ిݯ Λःஅ͢Δճ࿏ߏʹ͍ͯͩ͘͠͞ɻ ʁ ඇৗ࣌αʔϘΞϯϓͷ෦ճ࿏શͯ ৴༻͠ͳ͍ͷ͕ͩʁ
ˠʮԾఆɾఆʯΛແ֮ࣗʹஔ͍ͯ͠ ·͍ɼݕূΛΕΔ ˠಈ࡞ݕূΛख༡ͼͷบʹͯ͠ࣄނͷ نΛԼ͍͛ͨ
ྫϘλϯΏʙʙʙͬ͘Γͱԡ͜͠Ήɽ ҙਤɿνϟλϦϯάͷ༠ൃ ݱɿ͕৮ΕΔؒࡍͰߴʹ0/ 0''৴߸͕ग़Δ ༧͞ΕΔෆ߹ɿ ҰͭͷϘλϯͰӡసɾఀࢭࢦࣔΛ݉Ͷ Δ࣌ɼग़ྗ͕ϥϯμϜʹͳͬͯ͠·͏
ྫࣗͷҙਤͨ͠ಈ࡞Λ࿈ଓͯ͠ೖྗˍॱংΛແࢹ ҙਤɿఆͱ࣮ճ࿏ʢPS1SHʣͱͷဃ ΛௐΔɽ ݱɿॳظԽϛεʹΑΔ ·ͨɼѲͰ͖͍ͯͳ͍༷ʹΑ Δ ༧͞ΕΔෆ߹ɿ ϚχϡΞϧ֎ૢ࡞ʹࣄނʹͳΔ
ةͳ͍ͱΘ͔ͬͨΒ ػࡐͷఀࢭ ͦͷةݥ ִɾڐ༰Ͱ͖ Δʁ ͳͥ ͕ىͬͨ͜ͷ͔ߟ͑ ͔ͭ͘ ҆શ֬อɾ࠶࣮ݧ ػࡐͷղɾ୯ମͰͷ࣮ݧ
/P /P :FT :FT ҆શʹ͑Δ·ͰنΛখ͘͢͞Δ ӡ༻͕҆ఆ͠ͳ͍ͳΒ ʮ͋ΒΏΔૢ࡞ͰࢦࠩݺশʯΛਪ
ةͳ͍ͱΘ͔ͬͨΒ҆શࡦΛࢥ͍͔ͭͳ͍ͱ͖ ڐ༰Ͱ͖ͳ͍ةݥଛࣦ͕ൃੜ͢ΔͱΘ͔ͬͨ࣌Ͱ ҰखΛҾ͖·͠ΐ͏ɽ ษڧձͰ͍ΖΜͳਓʹ૬ஊ͔ͯ͠ΒΈͯ͘͠ͳ ͍ͣͰ͢ɽ
ిݯःஅஔͷճ࿏ͳΒͼʹ෦ࣄྫ (JU)VCϖʔδ