<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=RO>That looks like a user pointer?! De unde iei pointerul bh?</span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:dianagrecu07@gmail.com">Diana Grecu</a><br><b>Sent: </b>Tuesday, April 21, 2020 1:01 AM<br><b>To: </b><a href="mailto:olarupaulstelian97@gmail.com">Paul Olaru</a><br><b>Cc: </b><a href="mailto:so2@cursuri.cs.pub.ro">Sisteme de Operare 2</a>; <a href="mailto:alexandrumeterez@gmail.com">Alexandru Meterez</a><br><b>Subject: </b>Re: Re: [so2] [Tema 5] Problema pitix_write_inode</p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Nu e null, imi printeaza 53375450.</p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Tue, Apr 21, 2020 at 12:46 AM Paul Olaru <<a href="mailto:olarupaulstelian97@gmail.com">olarupaulstelian97@gmail.com</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=RO>Weird optimizations? Dă-i și un kprintf(„%px\n”, bh); înainte de if.</span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10</p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From: </b><a href="mailto:so2@cursuri.cs.pub.ro" target="_blank">Diana Grecu via so2</a><br><b>Sent: </b>Tuesday, April 21, 2020 12:45 AM<br><b>To: </b><a href="mailto:alexandrumeterez@gmail.com" target="_blank">Alexandru Meterez</a><br><b>Cc: </b><a href="mailto:so2@cursuri.cs.pub.ro" target="_blank">Sisteme de Operare 2</a><br><b>Subject: </b>Re: [so2] [Tema 5] Problema pitix_write_inode</p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am incercat, dar tot nu gasesc cauza problemei. Dereferentiez doar inode-ul primit ca parametru</p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>pentru a lua superblock-ul si apoi superblock-ul pentru a lua alte informatii necesare in functie.</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am incercat sa printez date din cele doua variabile (i_ino din inode si s_blocksize din superblock),</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>iar acestea au valori corecte, deci niciuna nu e null; de asta nu inteleg de unde apare</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>acel null pointer.</p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon, Apr 20, 2020 at 11:56 PM Alexandru Meterez <<a href="mailto:alexandrumeterez@gmail.com" target="_blank">alexandrumeterez@gmail.com</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Încearcă objdump -dS fișier.o --adjust-vma=adresa din lsmod. Daca nu merge pe o, vezi pe KO. </p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon, 20 Apr 2020, 23:54 Diana Grecu via so2, <<a href="mailto:so2@cursuri.cs.pub.ro" target="_blank">so2@cursuri.cs.pub.ro</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Il folosesc pe fisierul .o.</p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon, Apr 20, 2020, 11:53 PM Paul Olaru <<a href="mailto:olarupaulstelian97@gmail.com" target="_blank">olarupaulstelian97@gmail.com</a>> wrote:</p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=RO>addr2line pare că nu funcționează bine când îl folosesc pe fișierul .ko. Ai încercat pe fișierul .o al codului tău? Pare mai reliable în acel caz (pe .o și pe .ko dă rezultate diferite pe codul meu)</span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10</p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From: </b><a href="mailto:so2@cursuri.cs.pub.ro" target="_blank">Diana Grecu via so2</a><br><b>Sent: </b>Monday, April 20, 2020 11:49 PM<br><b>To: </b><a href="mailto:so2@cursuri.cs.pub.ro" target="_blank">Sisteme de Operare 2</a><br><b>Subject: </b>[so2] [Tema 5] Problema pitix_write_inode</p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Buna,</p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am o problema atunci cand creez un director sau un fisier nou; acestea sunt create,</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>apar in output-ul comenzii ls -l, dar dupa rularea comenzii primesc un "NULL pointer</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>dereference" din functia pitix_write_inode.</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am folosit addr2line ca sa vad linia care genereaza eroarea si arata ca ar fi de la</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>"if (!bh)", unde bh e buffer head-ul obtinut dupa citirea unui block de inodes, dar nu derefrentiez nimic in instructiunea respectiva.</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Are cineva vreo idee care ar putea fi problema?</p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Multumesc,</p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Diana</p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> </p></div></div></blockquote></div></blockquote></div></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:9.6pt'>_______________________________________________<br><a href="http://ocw.cs.pub.ro/courses/so2/resurse/lista-discutii" target="_blank">http://ocw.cs.pub.ro/courses/so2/resurse/lista-discutii</a></p></div></div></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:4.8pt'> </p><p class=MsoNormal><o:p> </o:p></p></div></body></html>