{"id":37963,"date":"2019-10-31T22:20:52","date_gmt":"2019-10-31T19:20:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf\/"},"modified":"2019-10-31T22:20:52","modified_gmt":"2019-10-31T19:20:52","slug":"v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-sostav-gcc-prinyat-bekend-dlya-kompilyatsii-v-ebpf","title":{"rendered":"A GCC elfogadta az eBPF-be val\u00f3 ford\u00edt\u00f3 h\u00e1tter\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A GCC ford\u00edt\u00f3 k\u00e9szlet r\u00e9sze elfogadta<\/a><\/noindex> k\u00f3d a Linux kernel\u00e9ben be\u00e9p\u00edtett bytecode \u00e9rtelmez\u0151 programok ford\u00edt\u00e1s\u00e1hoz eBPF<\/a><\/noindex>. A JIT-ford\u00edt\u00e1s alkalmaz\u00e1s\u00e1nak k\u00f6sz\u00f6nhet\u0151en a kernelben a bytecode fut\u00e1s k\u00f6zben g\u00e9pi utas\u00edt\u00e1sokk\u00e1 transzform\u00e1l\u00f3dik, \u00e9s nat\u00edv k\u00f3d teljes\u00edtm\u00e9ny\u00e9vel hajt\u00f3dik v\u00e9gre. Az eBPF t\u00e1mogat\u00e1s\u00e1r\u00f3l sz\u00f3l\u00f3 jav\u00edt\u00e1sok elfogadva<\/a><\/noindex> a GCC 10 kiad\u00e1si \u00e1g\u00e1ban.<\/p>\n

A bytecode gener\u00e1l\u00e1s\u00e1hoz sz\u00fcks\u00e9ges backend mellett a GCC tartalmazza az eBPF-hez k\u00e9sz\u00fclt libgcc portot \u00e9s az ELF-f\u00e1jlok l\u00e9trehoz\u00e1s\u00e1hoz sz\u00fcks\u00e9ges eszk\u00f6z\u00f6ket, amelyek lehet\u0151v\u00e9 teszik a k\u00f3d futtat\u00e1s\u00e1t az eBPF virtu\u00e1lis g\u00e9pben az oper\u00e1ci\u00f3s rendszer \u00e1ltal biztos\u00edtott bet\u00f6lt\u0151programok haszn\u00e1lat\u00e1val. Az eBPF t\u00e1mogat\u00e1s\u00e1hoz tartoz\u00f3 jav\u00edt\u00e1sokat az Oracle m\u00e9rn\u00f6kei k\u00e9sz\u00edtett\u00e9k, akik kor\u00e1bban m\u00e1r biztos\u00edtott\u00e1k<\/a><\/noindex> az eBPF t\u00e1mogat\u00e1s\u00e1t a GNU binutils-ban. Fejleszt\u00e9s alatt \u00e1ll egy szimul\u00e1tor \u00e9s jav\u00edt\u00e1sok a GDB-hez, amelyek lehet\u0151v\u00e9 teszik az eBPF programok hibakeres\u00e9s\u00e9t an\u00e9lk\u00fcl, hogy bet\u00f6lten\u00e9k a kernelbe.<\/p>\n

Az eBPF programok egy r\u00e9szes C nyelven defini\u00e1lhat\u00f3k, ford\u00edthat\u00f3k \u00e9s bet\u00f6lthet\u0151k a kernelbe. A v\u00e9grehajt\u00e1s el\u0151tt az eBPF \u00e9rtelmez\u0151 ellen\u0151rzi a bytecode-ot, hogy az enged\u00e9lyezett utas\u00edt\u00e1sokat alkalmazza-e, \u00e9s bizonyos szab\u00e1lyokat szab a k\u00f3dra (p\u00e9ld\u00e1ul ciklusok tilalma).
\nKezdetben az eBPF ford\u00edt\u00e1s\u00e1hoz Linux alatt LLVM alap\u00fa eszk\u00f6zk\u00e9szletet haszn\u00e1ltak. Az eBPF GCC t\u00e1mogat\u00e1sa \u00e9rdekess\u00e9 teszi, mivel lehet\u0151v\u00e9 teszi, hogy ugyanazt az eszk\u00f6zk\u00e9szletet haszn\u00e1ljuk a Linux kernel \u00e9s eBPF programok \u00f6ssze\u00e1ll\u00edt\u00e1s\u00e1hoz, tov\u00e1bbi f\u00fcgg\u0151s\u00e9gek telep\u00edt\u00e9se n\u00e9lk\u00fcl. <\/p>\n

Az eBPF programok seg\u00edts\u00e9g\u00e9vel network ops kezel\u0151ket hozhatunk l\u00e9tre, sz\u0171rhetj\u00fck a forgalmat, kezelhetj\u00fck a s\u00e1vsz\u00e9lt, nyomon k\u00f6vethetj\u00fck a rendszerek m\u0171k\u00f6d\u00e9s\u00e9t, elfoghatjuk a rendszerh\u00edv\u00e1sokat, kontroll\u00e1lhatjuk a hozz\u00e1f\u00e9r\u00e9st, megsz\u00e1ml\u00e1lhatjuk az elj\u00e1r\u00e1sok gyakoris\u00e1g\u00e1t \u00e9s v\u00e9grehajt\u00e1si idej\u00e9t, valamint nyomk\u00f6vet\u00e9st v\u00e9gezhet\u00fcnk kprobes\/uprobes\/tracepoints haszn\u00e1lat\u00e1val.<\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u043e\u0432 GCC \u043f\u0440\u0438\u043d\u044f\u0442 \u043a\u043e\u0434 \u0434\u043b\u044f \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0434\u043b\u044f \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u044f\u0434\u0440\u043e Linux \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u0430 \u0431\u0430\u0439\u0442\u043a\u043e\u0434\u0430 eBPF. \u0411\u043b\u0430\u0433\u043e\u0434\u0430\u0440\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044e JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438, \u0432 \u044f\u0434\u0440\u0435 \u0431\u0430\u0439\u0442\u043a\u043e\u0434 \u043d\u0430 \u043b\u0435\u0442\u0443 \u0442\u0440\u0430\u043d\u0441\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432 \u043c\u0430\u0448\u0438\u043d\u043d\u044b\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438 \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e \u043d\u0430\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430. \u041f\u0430\u0442\u0447\u0438 \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 eBPF \u043f\u0440\u0438\u043d\u044f\u0442\u044b \u0432 \u0432\u0435\u0442\u043a\u0443, \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0432\u044b\u043f\u0443\u0441\u043a GCC 10. \u041f\u043e\u043c\u0438\u043c\u043e \u0431\u044d\u043a\u0435\u043d\u0434\u0430 \u0434\u043b\u044f \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u0431\u0430\u0439\u0442\u043a\u043e\u0434\u0430 […]<\/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-37963","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\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\udd47 A GCC r\u00e9sz\u00e9v\u00e9 v\u00e1lt az eBPF ford\u00edt\u00e1shoz sz\u00fcks\u00e9ges backend | ProHoster","description":"A GCC ford\u00edt\u00f3 k\u00e9szlet r\u00e9sze a Linux kernel\u00e9be \u00e9p\u00edtett interpreter programok ford\u00edt\u00e1s\u00e1hoz sz\u00fcks\u00e9ges 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