{"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\/sk\/blog\/news\/podderzhka-rust-dlya-yadra-linux-stolknulas-s-kritikoj-torvaldsa","title":{"rendered":"Podpora Rust pre Linuxov\u00e9 jadro sa stretla s kritikou od Torvalds.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Linus Torvalds zrecenzoval patche s implement\u00e1ciou mo\u017enosti vytv\u00e1rania ovl\u00e1da\u010dov v jazyku Rust pre jadro Linuxu a vyjadril nieko\u013eko kritick\u00fdch pozn\u00e1mok. <\/p>\n

Najv\u00e4\u010d\u0161ie v\u00fdhrady vyvolala potenci\u00e1lna mo\u017enos\u0165 prechodu do panic() v chybov\u00fdch situ\u00e1ci\u00e1ch, napr\u00edklad v pr\u00edpade nedostatku pam\u00e4te, ke\u010f oper\u00e1cie dynamick\u00e9ho pridelenia pam\u00e4te, vr\u00e1tane t\u00fdch v jadre, m\u00f4\u017eu skon\u010di\u0165 chybou. Torvalds uviedol, \u017ee tak\u00fdto pr\u00edstup v jadre nie je principi\u00e1lne prijate\u013en\u00fd a v pr\u00edpade nepochopenia tohto bodu m\u00f4\u017ee \u00faplne odmietnu\u0165 (totally NAKed) ak\u00fdko\u013evek k\u00f3d, ktor\u00fd sa pok\u00fasi o tak\u00fdto pr\u00edstup. Na druhej strane, v\u00fdvoj\u00e1r pracuj\u00faci na patchoch s\u00fahlasil s touto problematikou a pova\u017euje ju za rie\u0161ite\u013en\u00fa. <\/p>\n

\u010eal\u0161\u00edm probl\u00e9mom sa stali pokusy o pou\u017e\u00edvanie v\u00fdpo\u010dtov s pl\u00e1vaj\u00facou desatinnou \u010diarkou alebo 128-bitov\u00fdmi typmi, \u010do nie je pr\u00edpustn\u00e9 pre tak\u00e9 prostredia, ako je jadro Linux. To sa uk\u00e1zalo by\u0165 v\u00e1\u017enej\u0161\u00edm probl\u00e9mom, preto\u017ee z\u00e1kladn\u00e1 (core) kni\u017enica Rust je nedelite\u013en\u00e1 a predstavuje jeden ve\u013ek\u00fd blob \u2014 nie je mo\u017en\u00e9 po\u017eiada\u0165 len o niektor\u00e9 z funkci\u00ed, \u010d\u00edm sa zabr\u00e1ni pou\u017e\u00edvaniu tej \u010di onej problematickej funkcionality. Rie\u0161enie probl\u00e9mu m\u00f4\u017ee vy\u017eadova\u0165 zmeny v kompil\u00e1tore Rust a kni\u017enici, pri\u010dom t\u00edm moment\u00e1lne nem\u00e1 strat\u00e9giu, ako realizova\u0165 modularitu kni\u017en\u00edc jazyka. <\/p>\n

Okrem toho Torvalds poznamenal, \u017ee poskytnut\u00fd pr\u00edklad ovl\u00e1da\u010da \u2014 je nepou\u017eite\u013en\u00fd a odporu\u010dil prilo\u017ei\u0165 ako pr\u00edklad nejak\u00fd ovl\u00e1da\u010d, ktor\u00fd rie\u0161i jednu z re\u00e1lnych \u00faloh. <\/p>\n

Doplnenie: Spolo\u010dnos\u0165 Google ozn\u00e1mila svoju \u00fa\u010das\u0165 na iniciat\u00edve na podporu Rust v jadre Linux a uviedla technick\u00e9 aspekty vhodnosti implement\u00e1cie Rust na boj s probl\u00e9mami sp\u00f4soben\u00fdmi chybami pri pr\u00e1ci s pam\u00e4\u0165ou. Google sa domnieva, \u017ee Rust je u\u017e pripraven\u00fd pripoji\u0165 sa k C ako jazyk na v\u00fdvoj komponentov jadra Linux. V \u010dl\u00e1nku s\u00fa taktie\u017e uveden\u00e9 pr\u00edklady pou\u017eitia jazyka Rust na v\u00fdvoj ovl\u00e1da\u010dov jadra v kontexte ich pou\u017eitia na platforme Android (Rust je uznan\u00fd ako ofici\u00e1lne podporovan\u00fd jazyk na v\u00fdvoj Androidu). <\/p>\n

Je zaznamenan\u00e9, \u017ee Google pripravil po\u010diato\u010dn\u00fd prototyp ovl\u00e1da\u010da nap\u00edsan\u00e9ho v jazyku Rust pre mechanizmus medziopera\u010dnej komunik\u00e1cie Binder, ktor\u00fd umo\u017en\u00ed podrobn\u00e9 porovnanie v\u00fdkonu a bezpe\u010dnosti implement\u00e1ci\u00ed Binder v C a Rust. V s\u00fa\u010dasnej podobe pr\u00e1ca e\u0161te nie je dokon\u010den\u00e1, ale takmer pre v\u0161etky z\u00e1kladn\u00e9 abstrakcie funk\u010dnosti jadra, potrebn\u00e9 na fungovanie Binder, s\u00fa pripraven\u00e9 vrstvy na vyu\u017eitie t\u00fdchto abstrakci\u00ed v k\u00f3de v jazyku Rust.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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