{"id":103436,"date":"2022-02-25T21:37:00","date_gmt":"2022-02-25T19:37:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11"},"modified":"2022-02-25T21:37:00","modified_gmt":"2022-02-25T19:37:00","slug":"v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","title":{"rendered":"Linux 5.18 tuumiku plaanib lubada C keele C11 standardi kasutamist","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Arutledes, mis k\u00e4sitlevad Spectre klassi haavatavuste parandamiseks seotud patchide komplekti, selgus, et probleem oleks elegantsemalt lahendatav, kui tuumas lubataks kasutada uudsemat C keele standardit. Praegusel hetkel peab tuumakood vastama ANSI C (C89) spetsifikatsioonile, mis loodi juba 1989. aastal. <\/p>\n

Spectre'iga seotud probleem koodis tekkis, kuna p\u00e4rast ts\u00fcklit j\u00e4tkati eraldi defineeritud iteraatori kasutamist \u2014 lingitud loendi elementide l\u00e4bimiseks kasutatakse makrot, ja kuna ts\u00fckli iteraator edastatakse sellesse makrosse, m\u00e4\u00e4ratakse see ts\u00fckli v\u00e4liselt ja j\u00e4\u00e4b ts\u00fckli j\u00e4rel k\u00e4tte saadavaks. C99 standardi kasutamine v\u00f5imaldaks m\u00e4\u00e4rata ts\u00fcklimuutujad for() plokis, mis lahendaks probleemi ilma ringteede leidmiseta. <\/p>\n

Linus Torvalds n\u00f5ustus ideega toetada uuemaid spetsifikatsioone ja pakkus, et versioonis 5.18 tuleks \u00fcleminek teha C11 standardile, mis ilmus 2011. aastal. Esialgsel kontrollimisel ei ilmunud GCC ja Clang uue re\u017eiimi kasutamisel mingeid vigu. Kui p\u00f5hjalikumate testide k\u00e4igus ei ilmne etten\u00e4gematuid probleeme, siis 5.18 tuumakogumi skriptides asendatakse valik \u2018\u2014std=gnu89\u2019 valikuga \u2018\u2014std=gnu11 -Wno-shift-negative-value\u2019. Samuti kaaluti C17 standardi kasutuselev\u00f5ttu, kuid sel juhul oleks pidanud t\u00f5stma minimaalset toetatud GCC versiooni. C11 toetuse sisseviimine sobitub aga praeguste GCC versiooni n\u00f5uetega (5.1).
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-103436","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Linuxi 5.18 tuumas plaanitakse lubada C11 standardi kasutamine | ProHoster","description":"Arutelude k\u00e4igus Spectre-probleemide lahendamiseks m\u00f5eldud koodipat\u0161ide komplekti osas, mis on seotud seotud nimekirjadega, selgus, et probleemi oleks v\u00f5imalik lahendada elegantselt, kui see oleks tuuma sisse 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