Discussion :

[elekis]

bonjour,
voila, je cherche un outils qui me permettrait de dire si j'ai des fuites de memoires dans un programme. ?? on m'a diqu'il en xistait un, mais j'ai pas trouvé.


merci

a++

[Invité]

Valgrind

http://valgrind.org/

[MarcG]

un autre :
http://www.gnome.org/projects/memprof/

[elekis]

heu grand merci


maisq il me met ca comme erreur

Code :

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g++ -o Brainiac Brain.o brainiac.o Engine.o Font.o Global.o Pix.o `sdl-config --libs` -Wall -ansi -g -lSDL_image
Brainiac
elekis@ubuntu:~/game/Brainiac/src$ val
valgrind           valgrind.bin       valgrind-listener  validlocale
elekis@ubuntu:~/game/Brainiac/src$ valgrind --leak-check=yes Brainiac
==9310== Memcheck, a memory error detector for x86-linux.
==9310== Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward et al.
==9310== Using valgrind-2.2.0, a program supervision framework for x86-linux.
==9310== Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward et al.
==9310== For more details, rerun with: -v
==9310==
==9310== Syscall param write(buf) contains uninitialised or unaddressable byte(s)
==9310==    at 0x1B8E4C02: (within /lib/ld-2.3.2.so)
==9310==    by 0x1BC79FFE: (within /usr/X11R6/lib/libX11.so.6.2)
==9310==    by 0x1BC7ACF4: _X11TransWrite (in /usr/X11R6/lib/libX11.so.6.2)
==9310==    by 0x1BC5B4B4: (within /usr/X11R6/lib/libX11.so.6.2)
==9310==  Address 0x1BDAB6AE is 14 bytes inside a block of size 16384 alloc'd
==9310==    at 0x1B905901: calloc (vg_replace_malloc.c:176)
==9310==    by 0x1BC4DD84: XOpenDisplay (in /usr/X11R6/lib/libX11.so.6.2)
==9310==    by 0x1B9531D8: (within /usr/lib/libSDL-1.2.so.0.7.1)
==9310==    by 0x1B948ACC: SDL_VideoInit (in /usr/lib/libSDL-1.2.so.0.7.1)
==9310==
==9310== ERROR SUMMARY: 2391 errors from 1 contexts (suppressed: 43 from 1)
==9310== malloc/free: in use at exit: 23022 bytes in 304 blocks.
==9310== malloc/free: 1273 allocs, 969 frees, 1564572 bytes allocated.
==9310== For counts of detected errors, rerun with: -v
==9310== searching for pointers to 304 not-freed blocks.
==9310== checked 4935568 bytes.
==9310==
==9310==
==9310== 8 bytes in 1 blocks are definitely lost in loss record 1 of 27
==9310==    at 0x1B9059FF: realloc (vg_replace_malloc.c:197)
==9310==    by 0x1BC9B259: (within /usr/X11R6/lib/libX11.so.6.2)
==9310==    by 0x1BC9C8AB: (within /usr/X11R6/lib/libX11.so.6.2)
==9310==    by 0x1BC9D6E1: (within /usr/X11R6/lib/libX11.so.6.2)
==9310==
==9310== LEAK SUMMARY:
==9310==    definitely lost: 8 bytes in 1 blocks.
==9310==    possibly lost:   0 bytes in 0 blocks.
==9310==    still reachable: 22814 bytes in 302 blocks.
==9310==         suppressed: 200 bytes in 1 blocks.
==9310== Reachable blocks (those to which a pointer was found) are not shown.
==9310== To see them, rerun with: --show-reachable=yes
elekis@ubuntu:~/game/Brainiac/src$

j'ai pas acces moi a
vg_replace_malloc.c:197
/usr/X11R6/lib/libX11.so.6.2
/usr/X11R6/lib/libX11.so.6.2
(within /usr/X11R6/lib/libX11.so.6.2

est ce normal???
merci

a+

[Invité]

Oui, tu peux te permettre d'ignorer les messages qui ne sont pas relie a ton programme. Valgrind evalue le binaire, incluant toutes les lib qu'il utilise, a mesure qu'il fonctionne. Il se peux qu'il detecte des anomalies (reelles ou non) dans les librairies systemes.

Si tu veux un outil graphique pour afficher les resultats, regarde pour alleyoop

[elekis]

grand merci