Re: [so] [Tema4][Linux] Memcheck failed

[Mihai Barbulescu via so]

Salut Rareș, Pe lângă ce a sugerat Răzvan încearcă să folosești helgrind, e ceva mai inteligent pe multithread stuff http://valgrind.org/docs/manual/hg-manual.html Cu stimă, Mihai Bărbulescu -------- Original Message -------- Subject: [so] [Tema4][Linux] Memcheck failed From: Rares Folea via so To: Sisteme de Operare CC: Buna seara! Ma confrunt cu urmatoarele probleme referitoare la testele de memorie: La rularea pe masina virtuala cu valgrind a testelor 15 si 19 (14 si 18 pe vmchecker), obtin 2 erori similare: ==4684== 288 bytes in 1 blocks are possibly lost in loss record 2 of 2 ==4684==    at 0x4C3204A: calloc (vg_replace_malloc.c:762) ==4684==    by 0x40134A6: allocate_dtv (dl-tls.c:286) ==4684==    by 0x40134A6: _dl_allocate_tls (dl-tls.c:530) ==4684==    by 0x5049227: allocate_stack (allocatestack.c:627) ==4684==    by 0x5049227: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644) ==4684==    by 0x4E3E65B: so_fork (in /home/student/l3-so-assignments/4-scheduler/checker-lin/libscheduler.so) ==4684==    by 0x10ABDE: test_sched_handler_15 (test_exec.c:282) ==4684==    by 0x4E3E47E: start_thread (in /home/student/l3-so-assignments/4-scheduler/checker-lin/libscheduler.so) ==4684==    by 0x50486DA: start_thread (pthread_create.c:463) ==4684==    by 0x538188E: clone (clone.S:95) ==4684==      possibly lost: 576 bytes in 2 blocks ==4684== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0) Nu reusesc sa-mi dau seama de la ce ar putea fi cele doua erori si de ce se manifesta doar la aceste doua teste. Mentionez ca astept terminarea thread-urilor cu pthread_join, care ar trebui sa efectueze eliberarea resurselor din structura pthread_t. In plus, la testul 16 (15 vmchecker), se pare ca valgrind ocupa mult prea multa memorie locala, iar ca urmare este omorat. student@vagrant:~/l3-so-assignments/4-scheduler/checker-lin$ LD_LIBRARY_PATH=. valgrind --tool=memcheck --track-origins=yes --leak-check=full _test/run_test 16 ==4693== Memcheck, a memory error detector ==4693== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==4693== Using Valgrind-3.15.0.GIT and LibVEX; rerun with -h for copyright info ==4693== Command: _test/run_test 16 ==4693==  Killed  Multumesc

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