390 lines
19 KiB
TeX
390 lines
19 KiB
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\vspace{1.0em}
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\noindent{\Large\bfseries Cel karty}\par
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\vspace{0.35em}
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Uczeń wybiera model heapu, śledzi kompletny most C++ i dowodzi na Hazard3, że suma wolnych bajtów nie gwarantuje jednego wystarczająco dużego bloku.
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\noindent{\Large\bfseries Zakres karty}\par
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\vspace{0.35em}
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Eksperyment linkuje wyłącznie prawdziwy \texttt{heap\_4.c}. \texttt{HeapStats} i \texttt{HeapWatermark} są tylko-odczytowymi wartościami; runtime-selected resource oraz typed allocator należą do K06.
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\section{Wybór heap\_1--heap\_5}
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}%
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]{}[-3.1em]
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\vspace{0.08em}%
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\hspace*{0.00em}\textcolor{red}{WE~01}\textcolor{black!48}{}\par%
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}%
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}[-3.1em]
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\begingroup
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\noindent drzewka: \pdftooltip[width=\textwidth]{D1}{K05.WE01.OG.LOCAL.MEM.POLICY.01 | WE 01: Modele heapu i dowód fragmentacji. Dobranie i\textCR zbadanie polityki dynamicznej pamięci FreeRTOS dla C++. | EN LOCAL MEM.POLICY.01: Dobiera\textCR model i interpretuje current, largest oraz minimum-ever. | KW LOCAL MEM.POLICY.01: Uzasadnia\textCR heap\_1, heap\_4 i heap\_5 dla trzech scenariuszy oraz nie myli total z largest.}\par
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\vspace{0.10em}%
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\noindent K1: Uzasadnij heap\_1, heap\_4 i heap\_5 dla trzech wdrożeń.\quad D1\par
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\ESCTinyStepSeparator
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\noindent K2: Wyjaśnij zależność heap\_3 od libc i linkera.\quad D1\par
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\par\vspace{0.18em}%
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\endgroup
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Porównaj możliwość free, koalescencję oraz źródło/regiony pamięci. Wybierz heap dla startup-only, jednej areny z delete i dwóch rozłącznych banków RAM.
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\section{Kompletny most C++}
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}[-3.1em]
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\noindent drzewka: \pdftooltip[width=\textwidth]{D1}{K05.WE01.TECH.LOCAL.DBG.HEAP.01 | WE 01: Modele heapu i dowód fragmentacji. Dobranie i\textCR zbadanie polityki dynamicznej pamięci FreeRTOS dla C++. | EK LOCAL DBG.HEAP.01: Koreluje\textCR adresy, statystyki, nagłówki bloków i symbole new/delete. | KW LOCAL DBG.HEAP.01: Pokazuje\textCR failure, koalescencję, retry, 3/3/0 i historyczne minimum-ever.}\par
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\vspace{0.10em}%
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\noindent K1: Potwierdź sześć symboli alokacji/dealokacji w ELF.\quad D1\par
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\noindent K2: Rozdziel fail-fast new od kontrolowanego raw probe.\quad D1\par
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Odszukaj scalar/array new oraz sized/unsized scalar/array delete. Zwykłe new jest fail-fast; raw pvPortMalloc pozostaje fallible.
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\ESCSectionBlockEnd
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\ESCSectionBlockStart
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\section{Fragmentacja, koalescencja i retry}
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}[-3.1em]
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\begingroup
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\scriptsize\ttfamily\color{black!60}\sloppy
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\noindent drzewka: \pdftooltip[width=\textwidth]{D1}{K05.WE01.TECH.LOCAL.DBG.HEAP.01 | WE 01: Modele heapu i dowód fragmentacji. Dobranie i\textCR zbadanie polityki dynamicznej pamięci FreeRTOS dla C++. | EK LOCAL DBG.HEAP.01: Koreluje\textCR adresy, statystyki, nagłówki bloków i symbole new/delete. | KW LOCAL DBG.HEAP.01: Pokazuje\textCR failure, koalescencję, retry, 3/3/0 i historyczne minimum-ever.}\par
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\vspace{0.10em}%
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\noindent K1: Zapisz dwa free blocks oraz relację request między largest i total.\quad D1\par
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\ESCTinyStepSeparator
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\noindent K2: Pokaż jeden blok po free B i udany retry.\quad D1\par
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\par\vspace{0.18em}%
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\endgroup
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Zwolnij A i C wokół żywego B. Udowodnij largest < request < total oraz failure. Zwolnij B i ponów identyczne żądanie po koalescencji.
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\ESCSectionBlockEnd
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\ESCSectionBlockStart
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\section{Watermark zachowuje historię}
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}[-3.1em]
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\begingroup
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\scriptsize\ttfamily\color{black!60}\sloppy
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\noindent drzewka: \pdftooltip[width=\textwidth]{D1}{K05.WE01.OG.LOCAL.MEM.POLICY.01 | WE 01: Modele heapu i dowód fragmentacji. Dobranie i\textCR zbadanie polityki dynamicznej pamięci FreeRTOS dla C++. | EN LOCAL MEM.POLICY.01: Dobiera\textCR model i interpretuje current, largest oraz minimum-ever. | KW LOCAL MEM.POLICY.01: Uzasadnia\textCR heap\_1, heap\_4 i heap\_5 dla trzech scenariuszy oraz nie myli total z largest.}\par
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\vspace{0.10em}%
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\noindent K1: Porównaj final current z minimum-ever i wylicz peak.\quad D1\par
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\par\vspace{0.18em}%
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\endgroup
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Po finalnym free current wraca do baseline, ale minimum-ever pozostaje historycznym minimum. Wylicz peak = baseline - minimum-ever.
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\ESCSectionBlockEnd
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\end{document}
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