{"id":32045,"date":"2019-10-31T21:44:52","date_gmt":"2019-10-31T18:44:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-valgrind-3-15-0-instrumentariya-dlya-vyyavleniya-problem-pri-rabote-s-pamyatyu\/"},"modified":"2019-10-31T21:44:52","modified_gmt":"2019-10-31T18:44:52","slug":"reliz-valgrind-3-15-0-instrumentariya-dlya-vyyavleniya-problem-pri-rabote-s-pamyatyu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/reliz-valgrind-3-15-0-instrumentariya-dlya-vyyavleniya-problem-pri-rabote-s-pamyatyu","title":{"rendered":"Rilascio di Valgrind 3.15.0, strumento per il rilevamento di problemi di gestione della memoria","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/sourceforge.net\/p\/valgrind\/mailman\/message\/36642596\/\">\u00c8 disponibile<\/a><\/noindex> il rilascio <noindex><a rel=\"nofollow\" href=\"http:\/\/valgrind.org\/\">Valgrind 3.15.0<\/a><\/noindex>, strumento per il debug della memoria, rilevamento delle perdite di memoria e profilazione. Il funzionamento di Valgrind \u00e8 supportato su piattaforme Linux (X86, AMD64, ARM32, ARM64, PPC32, PPC64BE, PPC64LE, S390X, MIPS32, MIPS64), Android (ARM, ARM64, MIPS32, X86), Solaris (X86, AMD64) e macOS (AMD64).<\/p>\n<p>In <noindex><a rel=\"nofollow\" href=\"http:\/\/valgrind.org\/docs\/manual\/dist.news.html\">nuova versione<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Significativamente <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/nnethercote\/2019\/04\/17\/a-better-dhat\/\">ristrutturata<\/a><\/noindex> ed \u00e8 stato ampliato lo strumento di profilazione della memoria heap DHAT (Dynamic Heap Analysis Tool), <noindex><a rel=\"nofollow\" href=\"http:\/\/valgrind.org\/docs\/manual\/dh-manual.html\">consentendo<\/a><\/noindex> tracciare tutte le richieste di allocazione della memoria in heap e identificare le perdite di risorse, le aree di attivit\u00e0 eccessivamente elevate nella gestione della heap, le allocazioni di memoria non utilizzate, le allocazioni a breve termine e il posizionamento inefficace dei dati nella heap. Dalla categoria delle sperimentazioni, DHAT \u00e8 stato integrato nel set di strumenti di Valgrind (ora \u00e8 necessario utilizzare l'opzione \u2018--tool=dhat\u2019 invece di \u2018--tool=exp-dhat\u2019).\n<p>Il miglioramento pi\u00f9 evidente \u00e8 stata l'aggiunta di un'interfaccia grafica utente a DHAT. Inoltre, dopo il completamento del programma monitorato, DHAT ora mostra a schermo solo un riepilogo minimo delle informazioni pi\u00f9 importanti, mentre la relazione completa con i dati di profilazione viene salvata in un file. I dati ora non vengono raggruppati in record, ma mantenuti come alberi di tracciamento dello stack. Sono stati ampliati il numero delle misurazioni effettuate e aggiunte categorie supplementari di parametri monitorati. Per visualizzare il rapporto salvato \u00e8 stato proposto un visualizzatore speciale dh_view.html, da aprire nel browser web;<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/ffp4g1ylyit3jdyti1hqcvtb-wpengine.netdna-ssl.com\/nnethercote\/files\/2019\/04\/dh-tree.png\"><img decoding=\"async\" alt=\"Rilascio di Valgrind 3.15.0, strumento per il rilevamento di problemi di gestione della memoria \" src=\"\/wp-content\/uploads\/2019\/04\/9991914838e3e36d4dcb89ea8c3eb087.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<li class=\"l\"> Per i sistemi amd64 (x86_64) \u00e8 stata fornita la compatibilit\u00e0 con i set di istruzioni avanzati RDRAND e F16C;\n<li class=\"l\"> In Cachegrind e Callgrind \u00e8 stata aggiunta una nuova opzione \u2018--show-percs\u2019 che include la visualizzazione dei valori dei contatori in percentuale;\n<li class=\"l\"> In Massif per Linux, Android e Solaris \u00e8 attivata per impostazione predefinita l'opzione \u2018--read-inline-info\u2019; per macOS \u00e8 ancora necessario specificare esplicitamente \u2018--read-inline-info=yes\u2019;\n<li class=\"l\"> In Memcheck, indicando l'opzione \u2018--xtree-leak=yes\u2019 (output dei risultati di verifica delle perdite di memoria in formato xtree), ora viene automaticamente attivata l'opzione \u2018--show-leak-kinds=all\u2019. \u00c8 stato effettuato un lavoro per prevenire falsi positivi;\n<li class=\"l\"> \u00c8 stata aggiunta l'opzione \u2018--show-error-list=no|yes\u2019, nonch\u00e9 l'opzione \u2018-s\u2019 equivalente a \u2018--show-error-list=yes\u2019 per visualizzare l'elenco degli errori rilevati al termine dell'esecuzione. In precedenza, un elenco simile veniva visualizzato in modalit\u00e0 di output dettagliato \u2018-v -v\u2019, ma l'output in quella modalit\u00e0 era ingombro di un'eccessiva quantit\u00e0 di informazioni superflue.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50546\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Valgrind 3.15.0, \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u0434\u043b\u044f \u043e\u0442\u043b\u0430\u0434\u043a\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043f\u0430\u043c\u044f\u0442\u044c\u044e, \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u0443\u0442\u0435\u0447\u0435\u043a \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043f\u0440\u043e\u0444\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. \u0420\u0430\u0431\u043e\u0442\u0430 Valgrind \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c Linux (X86, AMD64, ARM32, ARM64, PPC32, PPC64BE, PPC64LE, S390X, MIPS32, MIPS64), Android (ARM, ARM64, MIPS32, X86), Solaris (X86, AMD64) \u0438 macOS (AMD64). \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438: \u0417\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u0430\u043d \u0438 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u043f\u0440\u043e\u0444\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043a\u0443\u0447\u0438 DHAT (Dynamic Heap [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":23893,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-32045","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 Valgrind 3.15.0.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/news\/reliz-valgrind-3-15-0-instrumentariya-dlya-vyyavleniya-problem-pri-rabote-s-pamyatyu\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" 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