{"id":99807,"date":"2021-04-15T10:22:39","date_gmt":"2021-04-15T08:22:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/podderzhka-rust-dlya-yadra-linux-stolknulas-s-kritikoj-torvaldsa"},"modified":"2021-04-15T10:22:39","modified_gmt":"2021-04-15T08:22:39","slug":"podderzhka-rust-dlya-yadra-linux-stolknulas-s-kritikoj-torvaldsa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/podderzhka-rust-dlya-yadra-linux-stolknulas-s-kritikoj-torvaldsa","title":{"rendered":"Podpora Rust pro j\u00e1dro Linuxu se setkala s kritikou od Torvaldse.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Linus Torvalds provedl recenzov\u00e1n\u00ed patch\u016f s implementac\u00ed mo\u017enosti vytv\u00e1\u0159en\u00ed ovlada\u010d\u016f v jazyce Rust pro j\u00e1dro Linux a vyj\u00e1d\u0159il n\u011bkter\u00e9 kritick\u00e9 pozn\u00e1mky. <\/p>\n

Nejv\u011bt\u0161\u00ed v\u00fdtky vzbudila potenci\u00e1ln\u00ed mo\u017enost situac\u00ed paniky (panic()) v p\u0159\u00edpad\u011b chyb, nap\u0159\u00edklad v situaci nedostatku pam\u011bti, kdy operace dynamick\u00e9 alokace pam\u011bti, v\u010detn\u011b t\u011bch uvnit\u0159 j\u00e1dra, mohou selhat. Torvalds prohl\u00e1sil, \u017ee takov\u00fd p\u0159\u00edstup je v j\u00e1d\u0159e principi\u00e1ln\u011b nep\u0159ijateln\u00fd, a pokud si n\u011bkdo neuv\u011bdomuje tento bod, m\u016f\u017ee zcela odm\u00edtnout (totally NAKed) jak\u00fdkoli k\u00f3d, kter\u00fd se pokus\u00ed pou\u017e\u00edt podobn\u00fd p\u0159\u00edstup. Na druhou stranu, v\u00fdvoj\u00e1\u0159 pracuj\u00edc\u00ed na patche souhlasil s t\u00edmto probl\u00e9mem a pova\u017euje ho za \u0159e\u0161iteln\u00fd. <\/p>\n

Dal\u0161\u00ed probl\u00e9m p\u0159edstavovaly pokusy o pou\u017eit\u00ed v\u00fdpo\u010dt\u016f s plovouc\u00ed desetinnou \u010d\u00e1rkou nebo 128bitov\u00fdmi typy, co\u017e nen\u00ed p\u0159\u00edpustn\u00e9 pro takov\u00e1 prost\u0159ed\u00ed, jako je j\u00e1dro Linux. To se uk\u00e1zalo jako v\u00e1\u017en\u011bj\u0161\u00ed probl\u00e9m, proto\u017ee v sou\u010dasn\u00e9 dob\u011b je z\u00e1kladn\u00ed (core) knihovna Rust ned\u011bliteln\u00e1 a p\u0159edstavuje jeden velk\u00fd blob \u2014 neexistuje mo\u017enost po\u017eadovat pouze n\u011bkter\u00e9 z funkc\u00ed, \u010d\u00edm\u017e se zabr\u00e1n\u00ed pou\u017eit\u00ed konkr\u00e9tn\u00ed problematick\u00e9 funk\u010dnosti. \u0158e\u0161en\u00ed probl\u00e9mu m\u016f\u017ee vy\u017eadovat zm\u011bny v kompil\u00e1toru Rust a knihovn\u011b, p\u0159i\u010dem\u017e t\u00fdm zat\u00edm nem\u00e1 strategii, jak realizovat modularitu knihoven jazyka. <\/p>\n

Torrevalds tak\u00e9 poznamenal, \u017ee poskytnut\u00fd p\u0159\u00edklad ovlada\u010de \u2014 je k ni\u010demu a doporu\u010dil p\u0159ilo\u017eit jako p\u0159\u00edklad n\u011bjak\u00fd ovlada\u010d, kter\u00fd \u0159e\u0161\u00ed jeden z re\u00e1ln\u00fdch probl\u00e9m\u016f. <\/p>\n

Dopl\u0148uj\u00edc\u00ed informace: Spole\u010dnost Google ozn\u00e1mila svou \u00fa\u010dast v iniciativ\u011b na podporu Rustu v j\u00e1d\u0159e Linux a uvedla technick\u00e9 aspekty opodstatn\u011bnosti zaveden\u00ed Rustu k boji s probl\u00e9my vypl\u00fdvaj\u00edc\u00edmi z chyb p\u0159i pr\u00e1ci s pam\u011bt\u00ed. Google se domn\u00edv\u00e1, \u017ee Rust je ji\u017e p\u0159ipraven p\u0159ipojit se k C jako jazyk pro v\u00fdvoj komponent j\u00e1dra Linux. V \u010dl\u00e1nku jsou tak\u00e9 uvedeny p\u0159\u00edklady pou\u017eit\u00ed jazyka Rust pro v\u00fdvoj ovlada\u010d\u016f j\u00e1dra, v kontextu jejich vyu\u017eit\u00ed na platform\u011b Android (Rust byl ofici\u00e1ln\u011b uzn\u00e1n jako podporovan\u00fd jazyk pro v\u00fdvoj Androidu). <\/p>\n

Bylo ozn\u00e1meno, \u017ee Google p\u0159ipravil po\u010d\u00e1te\u010dn\u00ed prototyp ovlada\u010de napsan\u00e9ho v jazyce Rust pro mechanismus meziprocesn\u00ed komunikace Binder, kter\u00fd umo\u017en\u00ed podrobn\u00e9 srovn\u00e1n\u00ed v\u00fdkonu a bezpe\u010dnosti implementac\u00ed Binderu v C a Rustu. Pr\u00e1ce v sou\u010dasn\u00e9 podob\u011b je\u0161t\u011b nen\u00ed dokon\u010dena, ale t\u00e9m\u011b\u0159 pro v\u0161echny z\u00e1kladn\u00ed abstrakce funk\u010dnosti j\u00e1dra nezbytn\u00e9 pro fungov\u00e1n\u00ed Binderu byly p\u0159ipraveny vrstvy pro pou\u017eit\u00ed t\u011bchto abstrakc\u00ed v k\u00f3du napsan\u00e9m v jazyce Rust.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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