{"id":104757,"date":"2022-08-02T15:37:00","date_gmt":"2022-08-02T13:37:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-sistemnoj-biblioteki-glibc-2-36"},"modified":"2022-08-02T15:37:00","modified_gmt":"2022-08-02T13:37:00","slug":"vypusk-sistemnoj-biblioteki-glibc-2-36","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-sistemnoj-biblioteki-glibc-2-36","title":{"rendered":"A Glibc 2.36 rendszerk\u00f6nyvt\u00e1r kiad\u00e1sa.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Hat h\u00f3nappal a fejleszt\u00e9s ut\u00e1n megjelent a GNU C Library (glibc) 2.36 verzi\u00f3ja, amely teljes m\u00e9rt\u00e9kben megfelel az ISO C11 \u00e9s POSIX.1-2017 szabv\u00e1nyok k\u00f6vetelm\u00e9nyeinek. Az \u00faj kiad\u00e1s 59 fejleszt\u0151 jav\u00edt\u00e1sait tartalmazza.     <\/p>\n<p>A Glibc 2.36-ban megval\u00f3s\u00edtott fejleszt\u00e9sek k\u00f6z\u00fcl kiemelend\u0151:   <\/p>\n<ul>\n<li class=\"l\"> B\u0151v\u00fclt a DT_RELR (relat\u00edv \u00e1thelyez\u00e9sek) \u00faj form\u00e1tum\u00e1nak t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi a relat\u00edv \u00e1thelyez\u00e9sek m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9s\u00e9t megosztott objektumokban \u00e9s v\u00e9grehajthat\u00f3 f\u00e1jlokban, amelyek PIE (Position-independent executables) m\u00f3dban vannak \u00f6ssze\u00e1ll\u00edtva. A DT_RELR mez\u0151 haszn\u00e1lat\u00e1hoz az ELF f\u00e1jlokban sz\u00fcks\u00e9ges a &#171;-z pack-relative-relocs&#187; opci\u00f3 t\u00e1mogat\u00e1sa a linkel\u0151ben, amely a binutils 2.38 kiad\u00e1s\u00e1ban jelent meg.\n<li class=\"l\"> Linux platformra megval\u00f3s\u00edt\u00e1sra ker\u00fclt a pidfd_open, pidfd_getfd \u00e9s pidfd_send_signal funkci\u00f3k, amelyek hozz\u00e1f\u00e9r\u00e9st biztos\u00edtanak a pidfd funkci\u00f3hoz, amely seg\u00edt kezelni a PID \u00fajrafelhaszn\u00e1l\u00e1s\u00e1val kapcsolatos helyzeteket a folyamatok pontosabb azonos\u00edt\u00e1sa \u00e9rdek\u00e9ben, amikor nyomon k\u00f6vetett f\u00e1jlokhoz f\u00e9rnek hozz\u00e1 (a pidfd egy adott folyamathoz kapcsol\u00f3dik, \u00e9s nem v\u00e1ltozik, m\u00edg a PID egy m\u00e1sik folyamathoz is kapcsol\u00f3dhat a jelenlegi folyamat befejez\u00e9s\u00e9t k\u00f6vet\u0151en, amely hozz\u00e1rendelve volt ehhez a PID-hez).\n<li class=\"l\"> Linux platformra hozz\u00e1adva a process_madvise() funkci\u00f3, amely lehet\u0151v\u00e9 teszi egy folyamat sz\u00e1m\u00e1ra, hogy egy m\u00e1sik folyamat nev\u00e9ben madvise() rendszerh\u00edv\u00e1st v\u00e9gezzen, a c\u00e9lfolyamatot pidfd seg\u00edts\u00e9g\u00e9vel azonos\u00edtva. A madvise() lehet\u0151s\u00e9get biztos\u00edt arra, hogy a kernel \u00e9rtes\u00fclj\u00f6n a mem\u00f3riahaszn\u00e1lati szok\u00e1sokr\u00f3l a mem\u00f3ria kezel\u00e9s\u00e9nek optimaliz\u00e1l\u00e1sa \u00e9rdek\u00e9ben, p\u00e9ld\u00e1ul a megadott inform\u00e1ci\u00f3k alapj\u00e1n a kernel kezdem\u00e9nyezheti az extra szabad mem\u00f3ria felszabad\u00edt\u00e1s\u00e1t. A madvise() m\u00e1sik folyamat \u00e1ltali h\u00edv\u00e1s\u00e1ra abban az esetben lehet sz\u00fcks\u00e9g, amikor az optimaliz\u00e1l\u00e1shoz sz\u00fcks\u00e9ges inform\u00e1ci\u00f3k ismeretlenek a folyamat sz\u00e1m\u00e1ra, \u00e9s egy k\u00fcl\u00f6n h\u00e1tt\u00e9rkezel\u0151 folyamat koordin\u00e1lja, amely \u00f6n\u00e1ll\u00f3an kezdem\u00e9nyezheti a nem haszn\u00e1lt mem\u00f3ria visszavon\u00e1s\u00e1t a folyamatokt\u00f3l.\n<li class=\"l\"> A Linux platformhoz hozz\u00e1adva a process_mrelease() funkcionalit\u00e1s, amely felgyors\u00edtja a mem\u00f3ria felszabad\u00edt\u00e1s\u00e1t a v\u00e9grehajt\u00e1st befejez\u0151 folyamatok eset\u00e9ben. Norm\u00e1l k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt az er\u0151forr\u00e1sok felszabad\u00edt\u00e1sa \u00e9s a folyamatok befejez\u00e9se nem azonnali, \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 okok miatt k\u00e9slekedhet, ami zavarhatja a felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151, korai mem\u00f3riahi\u00e1nyos reakci\u00f3s rendszerek m\u0171k\u00f6d\u00e9s\u00e9t, mint p\u00e9ld\u00e1ul az oomd (amely a systemd r\u00e9sz\u00e9t k\u00e9pezi). A process_mrelease h\u00edv\u00e1s\u00e1val az ilyen rendszerek kisz\u00e1m\u00edthat\u00f3bban kezdem\u00e9nyezhetik a mem\u00f3ria visszaad\u00e1s\u00e1t a k\u00e9nyszer\u00edtett befejez\u00e9s alatt \u00e1ll\u00f3 folyamatokt\u00f3l.\n<li class=\"l\"> A DNS-lez\u00e1r\u00f3 be\u00e9p\u00edtett megval\u00f3s\u00edt\u00e1s\u00e1ba hozz\u00e1ad\u00f3dott a &#171;no-aaaa&#187; opci\u00f3 t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi, hogy a probl\u00e9m\u00e1k diagnosztik\u00e1j\u00e1nak egyszer\u0171s\u00edt\u00e9se \u00e9rdek\u00e9ben letiltsuk az AAAA rekordok DNS-lek\u00e9rdez\u00e9seinek k\u00fcld\u00e9s\u00e9t (IPv6 c\u00edm meghat\u00e1roz\u00e1sa a host n\u00e9v alapj\u00e1n), bele\u00e9rtve az NSS f\u00fcggv\u00e9nyek, mint a getaddrinfo() v\u00e9grehajt\u00e1s\u00e1t. Az opci\u00f3 nem befoly\u00e1solja az IPv6 c\u00edmek k\u00f6t\u00e9seinek feldolgoz\u00e1s\u00e1t, amelyek a \/etc\/hosts f\u00e1jlban vannak defini\u00e1lva, \u00e9s a getaddrinfo() h\u00edv\u00e1sokat AI_PASSIVE flaggel.\n<li class=\"l\"> A Linux platformhoz hozz\u00e1adva az fsopen, fsmount, move_mount, fsconfig, fspick, open_tree \u00e9s mount_setattr funkci\u00f3k, amelyek hozz\u00e1f\u00e9r\u00e9st biztos\u00edtanak egy \u00faj kernel API-hoz a f\u00e1jlrendszerek csatol\u00e1s\u00e1nak kezel\u00e9s\u00e9re a csatol\u00e1si n\u00e9vrendszerek (mount namespaces) figyelembev\u00e9tel\u00e9vel. Az \u00e1ltalam javasolt funkci\u00f3k lehet\u0151v\u00e9 teszik a csatol\u00e1s k\u00fcl\u00f6nb\u00f6z\u0151 szakaszainak sz\u00e9tv\u00e1lasztott kezel\u00e9s\u00e9t (szuperblokk feldolgoz\u00e1sa, f\u00e1jlrendszer inform\u00e1ci\u00f3k megszerz\u00e9se, csatlakoz\u00e1s, csatol\u00e1s a csatol\u00e1si pontra), amelyek kor\u00e1bban a mount() \u00e1ltal\u00e1nos funkci\u00f3 seg\u00edts\u00e9g\u00e9vel val\u00f3sultak meg. A k\u00fcl\u00f6n\u00e1ll\u00f3 funkci\u00f3k lehet\u0151s\u00e9get biztos\u00edtanak bonyolultabb csatol\u00e1si forgat\u00f3k\u00f6nyvek v\u00e9grehajt\u00e1s\u00e1ra, \u00e9s lehet\u0151v\u00e9 teszik olyan m\u0171veletek k\u00fcl\u00f6n elv\u00e9gz\u00e9s\u00e9t is, mint a szuperblokk \u00fajrakonfigur\u00e1l\u00e1sa, opci\u00f3k aktiv\u00e1l\u00e1sa, csatol\u00e1si pont m\u00f3dos\u00edt\u00e1sa \u00e9s \u00e1ttelep\u00edt\u00e9s m\u00e1s n\u00e9vrendszerbe. Ezen k\u00edv\u00fcl a k\u00fcl\u00f6n\u00e1ll\u00f3 feldolgoz\u00e1s pontosan meghat\u00e1rozhatja a hiba k\u00f3dok kibocs\u00e1t\u00e1s\u00e1nak okait, \u00e9s t\u00f6bb forr\u00e1st adhat meg a t\u00f6bb r\u00e9teg\u0171 f\u00e1jlrendszerek (p\u00e9ld\u00e1ul overlayfs) sz\u00e1m\u00e1ra.\n<li class=\"l\"> A localedef megval\u00f3s\u00edtotta a nyelvi defin\u00edci\u00f3s f\u00e1jlok kezel\u00e9s\u00e9nek t\u00e1mogat\u00e1s\u00e1t, amelyek UTF-8 k\u00f3dol\u00e1sban \u00e9rkeznek az ASCII helyett.\n<li class=\"l\"> \u00daj funkci\u00f3k ker\u00fcltek hozz\u00e1ad\u00e1sra a t\u00f6bb b\u00e1jt k\u00f3dol\u00e1sok mbrtoc8 \u00e9s c8rtomb \u00e1talak\u00edt\u00e1s\u00e1hoz, amelyek megfelelnek az ISO C2X N2653 \u00e9s C++20 P0482R6 specifik\u00e1ci\u00f3knak.\n<li class=\"l\"> Hozz\u00e1adva a char8_t t\u00edpus t\u00e1mogat\u00e1sa, amelyet az ISO C2X N2653 szabv\u00e1ny tervezete hat\u00e1roz meg.\n<li class=\"l\"> Megjelentek az arc4random, arc4random_buf \u00e9s arc4random_uniform funkci\u00f3k, amelyek a getrandom rendszerh\u00edv\u00e1s \u00e9s a \/dev\/urandom interf\u00e9sz k\u00f6r\u00e9 \u00e9p\u00fclnek, \u00e9s magas min\u0151s\u00e9g\u0171 \u00e1lkiv\u00e1lasztott sz\u00e1mokat adnak vissza.\n<li class=\"l\"> Linux platformon megval\u00f3sult a LoongArch utas\u00edt\u00e1sk\u00e9szlet architekt\u00far\u00e1j\u00e1nak t\u00e1mogat\u00e1sa, amely a Loongson 3 5000 processzorokban tal\u00e1lhat\u00f3, \u00e9s egy \u00faj RISC ISA-t val\u00f3s\u00edt meg, amely hasonl\u00edt a MIPS-re \u00e9s RISC-V-re. Jelenleg csak a 64-bites LoongArch (LA64) t\u00e1mogat\u00e1sa \u00e9rhet\u0151 el. Legal\u00e1bb 2.38-as verzi\u00f3j\u00fa binutils, 12-es GCC \u00e9s 5.19-es Linux kernel sz\u00fcks\u00e9ges a m\u0171k\u00f6d\u00e9shez.\n<li class=\"l\">  A prelink mechanizmus elavultnak nyilv\u00e1n\u00edtva, \u00e9s a k\u00f6vetkez\u0151 kiad\u00e1sban elt\u00e1vol\u00edt\u00e1sra ker\u00fcl, valamint a kapcsol\u00f3d\u00f3 LD_TRACE_PRELINKING \u00e9s LD_USE_LOAD_BIAS k\u00f6rnyezeti v\u00e1ltoz\u00f3k \u00e9s a linker funkci\u00f3k.\n<li class=\"l\"> Elt\u00e1vol\u00edt\u00e1sra ker\u00fclt a Linux kernel verzi\u00f3ellen\u0151rz\u00e9s\u00e9\u00e9rt \u00e9s az LD_ASSUME_KERNEL k\u00f6rnyezeti v\u00e1ltoz\u00f3 kezel\u00e9s\u00e9\u00e9rt felel\u0151s k\u00f3d. A Glibc ford\u00edt\u00e1sakor a minim\u00e1lisan t\u00e1mogatott kernel verzi\u00f3 az ELF NT_GNU_ABI_TAG mez\u0151 alapj\u00e1n van meghat\u00e1rozva.\n<li class=\"l\"> A Linux platformon megsz\u0171nt a LD_LIBRARY_VERSION k\u00f6rnyezeti v\u00e1ltoz\u00f3 t\u00e1mogat\u00e1sa.  <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57585\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.36, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2017. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 59 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.36 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043d\u043e\u0432\u043e\u0433\u043e \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043f\u0435\u0440\u0435\u043c\u0435\u0449\u0435\u043d\u0438\u0439 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 DT_RELR (relative relocation), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0441\u043e\u043a\u0440\u0430\u0442\u0438\u0442\u044c \u0440\u0430\u0437\u043c\u0435\u0440 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043f\u0435\u0440\u0435\u043c\u0435\u0449\u0435\u043d\u0438\u0439 \u0432 [&hellip;]<\/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-104757","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.36, \u043a\u043e\u0442\u043e\u0440\u0430\u044f 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