{"id":115001,"date":"2024-04-12T02:30:02","date_gmt":"2024-04-12T00:30:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kompaniya-oracle-opublikovala-dtrace-dlya-linux-2-0-0-1-14"},"modified":"2024-04-12T02:30:02","modified_gmt":"2024-04-12T00:30:02","slug":"kompaniya-oracle-opublikovala-dtrace-dlya-linux-2-0-0-1-14","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/kompaniya-oracle-opublikovala-dtrace-dlya-linux-2-0-0-1-14","title":{"rendered":"Az Oracle megjelentette a DTrace-t Linuxra 2.0.0-1.14.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bemutat\u00e1sra ker\u00fclt a DTrace dinamikus hibakeres\u00e9si eszk\u00f6z Linux 2.0.0-1.14-es verzi\u00f3j\u00e1hoz k\u00e9sz\u00fclt k\u00eds\u00e9rleti kiad\u00e1sa, amely felhaszn\u00e1l\u00f3i t\u00e9rben fut\u00f3 folyamat form\u00e1j\u00e1ban val\u00f3sul meg, az eBPF alrendszert \u00e9s a Linux kernel \u00e1ltal biztos\u00edtott nyomoz\u00e1si mechanizmusokat felhaszn\u00e1lva. A funkcion\u00e1lisan az eBPF alap\u00fa DTrace megval\u00f3s\u00edt\u00e1sa k\u00f6zel \u00e1ll az els\u0151, Linux sz\u00e1m\u00e1ra k\u00e9sz\u00fclt DTrace megval\u00f3s\u00edt\u00e1shoz, amely kernel modul form\u00e1j\u00e1ban k\u00e9sz\u00fclt. A projekt k\u00f3dja GPLv2 licenc alatt terjesztend\u0151.     <\/p>\n<p>Az eszk\u00f6z haszn\u00e1lhat\u00f3 a BPF-t t\u00e1mogat\u00f3 alap\u00e9rtelmezett Linux kernel verzi\u00f3kkal. A m\u0171k\u00f6d\u00e9shez sz\u00fcks\u00e9ges a libctf k\u00f6nyvt\u00e1r, amely t\u00e1mogatja a CTF (Compact Type Format) hibakeres\u00e9si form\u00e1tumot, \u00e9s amely a binutils csomag r\u00e9sze a 2.40-es verzi\u00f3t\u00f3l kezdve, vagy a Solarisb\u00f3l portolt libdtrace-ctf k\u00f6nyvt\u00e1r. Opcion\u00e1lisan k\u00e9t jav\u00edt\u00f3csomag \u00e9rhet\u0151 el a 6.7-es kernelhez, amelyek lehet\u0151v\u00e9 teszik kiterjesztett k\u00e9pess\u00e9gek haszn\u00e1lat\u00e1t tov\u00e1bbi modul \u00e9s kernel adatgy\u0171jt\u00e9s\u00e9hez.    <\/p>\n<p>A DTrace technol\u00f3gi\u00e1t a kernel \u00e9s a v\u00e9gs\u0151 alkalmaz\u00e1sok dinamikus nyomoz\u00e1si feladataira fejlesztett\u00e9k ki a Solaris oper\u00e1ci\u00f3s rendszerben. A DTrace lehet\u0151s\u00e9get ad a felhaszn\u00e1l\u00f3nak, hogy r\u00e9szletesen nyomon k\u00f6vesse a rendszer m\u0171k\u00f6d\u00e9s\u00e9t, \u00e9s val\u00f3s id\u0151ben diagnosztiz\u00e1lja a probl\u00e9m\u00e1kat. A hibakeres\u00e9s sor\u00e1n a DTrace nem befoly\u00e1solja a vizsg\u00e1lt alkalmaz\u00e1sok m\u0171k\u00f6d\u00e9s\u00e9t, \u00e9s egy\u00e1ltal\u00e1n nem hat a teljes\u00edtm\u00e9ny\u00fckre, ami lehet\u0151v\u00e9 teszi a m\u0171k\u00f6d\u0151 rendszerek elemz\u00e9s\u00e9t menet k\u00f6zben. A DTrace er\u0151ss\u00e9gei k\u00f6z\u00f6tt emelj\u00fck ki a D nyelvet, amely hasonl\u00edt az AWK-ra, \u00e9s amelyen jelent\u0151sen egyszer\u0171bben k\u00e9sz\u00edthet\u0151k nyomoz\u00e1si szkriptek, mint az eBPF eszk\u00f6zeivel, amelyek C, Python \u00e9s Lua nyelveken \u00edrt feldolgoz\u00f3kkal k\u00fcls\u0151 k\u00f6nyvt\u00e1rakat ig\u00e9nyelnek.     <\/p>\n<p>F\u0151bb funkci\u00f3k:  <\/p>\n<ul>\n<li class=\"l\"> El\u00e9rhet\u0151 szolg\u00e1ltat\u00f3k:\n<ul>\n<li class=\"l\"> cpc (CPU Teljes\u00edtm\u00e9ny Sz\u00e1ml\u00e1l\u00f3) \u2014 a teljes\u00edtm\u00e9nnyel kapcsolatos inform\u00e1ci\u00f3k megszerz\u00e9se.\n<li class=\"l\"> dtrace \u2014 a BEGIN, END \u00e9s ERROR kezel\u0151k v\u00e9grehajt\u00e1sa m\u00e1s ellen\u0151rz\u00e9sek el\u0151tt vagy ut\u00e1n, valamint hiba eset\u00e9n.\n<li class=\"l\"> fbt (Funkci\u00f3 Hat\u00e1r Nyomoz\u00e1s) \u2014 a kernel funkci\u00f3ihoz val\u00f3 h\u00edv\u00e1sok nyomon k\u00f6vet\u00e9se.\n<li class=\"l\"> lockstat \u2014 a z\u00e1rol\u00e1sok \u00e1llapot\u00e1nak nyomon k\u00f6vet\u00e9se.\n<li class=\"l\"> pid \u2014 a felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151 folyamatok funkci\u00f3ihoz val\u00f3 h\u00edv\u00e1sok nyomon k\u00f6vet\u00e9se.\n<li class=\"l\"> proc \u2014 a folyamatokkal kapcsolatos aktivit\u00e1s nyomon k\u00f6vet\u00e9se, mint p\u00e9ld\u00e1ul elind\u00edt\u00e1s \u00e9s le\u00e1ll\u00edt\u00e1s (fork, exec, exit, fault).\n<li class=\"l\"> profile \u2014 a teljes\u00edtm\u00e9ny statisztik\u00e1inak meg\u0151rz\u00e9se adott id\u0151k\u00f6z\u00f6nk\u00e9nt.\n<li class=\"l\"> sdt, rawtp \u2014 statikus kernel nyomoz\u00e1s (SDT \u2014 Statically Defined Tracing).\n<li class=\"l\"> usdt: statikus alkalmaz\u00e1s nyomoz\u00e1s (USDT \u2014 Userspace Statically Defined Tracing)\n<li class=\"l\"> sched \u2014 a CPU er\u0151forr\u00e1sok eloszt\u00e1s\u00e1nak nyomon k\u00f6vet\u00e9se.\n<li class=\"l\"> sycall \u2014 a rendszerh\u00edv\u00e1sokba val\u00f3 bel\u00e9p\u00e9s \u00e9s onnan val\u00f3 kil\u00e9p\u00e9s nyomon k\u00f6vet\u00e9se.    <\/ul>\n<li class=\"l\"> Gy\u0171jt\u00f6tt adatok aggreg\u00e1l\u00e1sa: lehet\u0151s\u00e9g aggreg\u00e1l\u00f3 funkci\u00f3k (avg, count, llquantize, lquantize, max, min, quantize, stddev \u00e9s sum) \u00e9s aggreg\u00e1l\u00f3 m\u0171veletek (clear, normalize, printa) alkalmaz\u00e1s\u00e1ra. Az aggreg\u00e1l\u00f3 funkci\u00f3k eredm\u00e9nyeinek megszor\u00edt\u00e1sa norm\u00e1l \u00e9s asszociat\u00edv t\u00f6mb\u00f6kben t\u00e1mogatott.\n<li class=\"l\"> Speculativ nyomk\u00f6vet\u00e9s t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi az adatok \u00e1tmeneti nyomk\u00f6vet\u00e9s\u00e9t, d\u00f6ntve arr\u00f3l, hogy mely adatokat r\u00f6gz\u00edtsen a nyomk\u00f6vet\u0151 pufferben \u00e9s melyeket dobjon el. El\u00e9rhet\u0151k a k\u00f6vetkez\u0151 funkci\u00f3k: speculation, speculate, commit \u00e9s discard.\n<li class=\"l\"> Glob\u00e1lis \u00e9s helyi v\u00e1ltoz\u00f3k, TLS (Thread-Local Storage), asszociat\u00edv t\u00f6mb\u00f6k \u00e9s karakterl\u00e1ncok t\u00e1mogat\u00e1sa.\n<li class=\"l\"> Be\u00e9p\u00edtett v\u00e1ltoz\u00f3k biztos\u00edt\u00e1sa: arg0 \u2014 arg9, args[], caller, curcpu, curthread, epid, errno, execname, gid, id, pid, ppid, probefunc, probemod, probename, probeprov, stackdepth, tid, timestamp, ucaller, uid, uregs[], ustackdepth, walltimestamp.\n<li class=\"l\"> K\u00f6vetkez\u0151 m\u0171veletek t\u00e1mogat\u00e1sa: exit, freopen, ftruncate, mod, printa, printf, raise, setopt, stack, sym, system, trace, tracemem, uaddr, umod, ustack \u00e9s usym.\n<li class=\"l\"> Be\u00e9p\u00edtett funkci\u00f3k megl\u00e9te: alloca, basename, bcopy, copyin, copyinstr, copyinto, copyout, copyoutstr, dirname, getmajor, getminor, htonl, htonll, htons, index, inet_ntoa, lltostr, mutex_owned, mutex_owner, mutex_type_adaptive, mutex_type_spin, ntohl, ntohll, ntohs, progenyof, rand, rindex, rw_iswriter, rw_read_held, rw_write_held, strchr, strjoin, strlen, strrchr, strstr, strtok, substr.\n<li class=\"l\"> Nyomkovetett pufferbe nem ker\u00fcl\u0151 adatsz\u00e1ml\u00e1l\u00f3k megl\u00e9te.\n<li class=\"l\"> K\u00f6vet\u00e9si szkriptek D nyelven t\u00f6rt\u00e9n\u0151 Ford\u00edt\u00e1s\u00e1nak t\u00e1mogat\u00e1sa BPF-programokk\u00e1.\n<li class=\"l\"> BPF f\u00fcggv\u00e9nyek el\u0151kompil\u00e1l\u00e1sa k\u00f6nyvt\u00e1ri h\u00edv\u00e1sokhoz.\n<li class=\"l\"> bpflog lehet\u0151s\u00e9g a bet\u00f6lt\u00f6tt BPF-programok ellen\u0151rz\u00e9si napl\u00f3j\u00e1nak r\u00f6gz\u00edt\u00e9s\u00e9hez.\n<li class=\"l\"> Dinamikus k\u00f3dgener\u00e1l\u00e1s \u00e9s k\u00f3d el\u0151kompil\u00e1l\u00e1s a BPF-programok \u00fajrafelhaszn\u00e1l\u00e1s\u00e1hoz.    <\/ul>\n<p>\u00dajdons\u00e1gok az \u00faj verzi\u00f3ban:  <\/p>\n<ul>\n<li class=\"l\"> A pid szolg\u00e1ltat\u00f3ba, amelyet a felhaszn\u00e1l\u00f3i t\u00e9r folyamatainak nyomk\u00f6vet\u00e9s\u00e9re haszn\u00e1lnak, hozz\u00e1 lett adva az utas\u00edt\u00e1sok nyomk\u00f6vet\u00e9s\u00e9nek t\u00e1mogat\u00e1sa a k\u00f3don bel\u00fcli eltol\u00e1suk alapj\u00e1n.\n<li class=\"l\"> A stack() \u00e9s ustack() f\u00fcggv\u00e9nyek alkalmaz\u00e1s\u00e1nak t\u00e1mogat\u00e1sa a gy\u0171jt\u00f6tt adatok aggreg\u00e1l\u00e1s\u00e1hoz.\n<li class=\"l\"> Az asszociat\u00edv t\u00f6mb\u00f6k elemeinek b\u00e1rmilyen t\u00edpus\u00fa elt\u00e1vol\u00edt\u00e1s\u00e1nak lehet\u0151s\u00e9ge 0 liter\u00e1l hozz\u00e1rendel\u00e9s\u00e9vel.\n<li class=\"l\"> A struktur\u00e1lt adatok t\u00edpusannot\u00e1ci\u00f3val val\u00f3 kinyomtat\u00e1s\u00e1hoz hozz\u00e1adva a print m\u0171velet.\n<li class=\"l\"> \u00daj be\u00e9p\u00edtett funkci\u00f3k: cleanpath(), d_path() \u00e9s link_ntop() hozz\u00e1adva.\n<li class=\"l\"> Hozz\u00e1adva az '-xcpu' param\u00e9ter, amely lehet\u0151v\u00e9 teszi a vizsg\u00e1latok k\u00f6t\u00e9s\u00e9t bizonyos CPU-khoz.\n<li class=\"l\"> Hozz\u00e1adva az '-xlockmem' param\u00e9ter a mem\u00f3ria m\u00e9ret\u00e9nek korl\u00e1toz\u00e1s\u00e1hoz.\n<li class=\"l\"> Biztos\u00edtott a folyamatok (USDT) nyomk\u00f6vet\u00e9si adatai k\u00f6z\u00f6tti ment\u00e9s lehet\u0151s\u00e9ge a dtprobed \u00fajraind\u00edt\u00e1sai k\u00f6z\u00f6tt.\n<li class=\"l\"> T\u00e1mogat\u00e1s a BTF (BPF Type Format) mechanizmushoz, amely inform\u00e1ci\u00f3t ny\u00fajt a t\u00edpusok ellen\u0151rz\u00e9s\u00e9hez a BPF pszeudok\u00f3dban.\n<li class=\"l\"> Lehet\u0151s\u00e9g egy configure szkript haszn\u00e1lat\u00e1ra a buildel\u00e9shez.  <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60973\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043e\u0442\u043b\u0430\u0434\u043a\u0438 DTrace \u0434\u043b\u044f Linux 2.0.0-1.14, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432 \u0432\u0438\u0434\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0435\u0433\u043e \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 eBPF \u0438 \u0448\u0442\u0430\u0442\u043d\u044b\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0438, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0445 \u044f\u0434\u0440\u043e\u043c Linux. \u041f\u043e \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f DTrace \u043d\u0430 \u0431\u0430\u0437\u0435 eBPF \u0431\u043b\u0438\u0437\u043a\u0430 \u043a \u043f\u0435\u0440\u0432\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 DTrace \u0434\u043b\u044f Linux, \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u043d\u043e\u0439 \u0432 \u0444\u043e\u0440\u043c\u0435 \u043c\u043e\u0434\u0443\u043b\u044f \u044f\u0434\u0440\u0430. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2. \u0418\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 [&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-115001","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\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d 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