Valgrind

  • kontrola prace s pamatou
  • kontrola ci sa nepouzivaju neinicializovane premenne
  • kontrola ci sa uvolnuje pamat po dynamicky alokovanych premennych
  • hlasenia Valgrindu v standardnej kniznici ( std::string::_S_construc ) a podobne su sposobene vlastnou spravou pamate standardnej knznice a nie su to uniky pamate

Zaujimave prepinace

  • pri hlaseni conditional jumpu je dobre si medzi parametre zapnut zobrazovanie kde problemova premenna vznikla:
--track-origins=yes
  • dalsie zaujimave parametre su:
--leak-check=full
--show-reachable=yes

libc MALLOC_CHECK_

  • kontroluje mazanie premennych - dvojite delete(free)

Recent versions of Linux libc (later than 5.4.23) and GNU libc (2.x) include a malloc implementation which is tunable via environment variables. When MALLOC_CHECK_ is set, a special (less efficient) implementation is used which is designed to be tolerant against simple errors, such as double calls of free() with the same argument, or overruns of a single byte (off-by-one bugs). Not all such errors can be protected against, however, and memory leaks can result. If MALLOC_CHECK_ is set to 0, any detected heap corruption is silently ignored; if set to 1, a diagnostic is printed on stderr; if set to 2, abort() is called immediately. This can be useful because other-wise a crash may happen much later, and the true cause for the problem is then very hard to track down.

gdb

 
coding/tools.txt · Last modified: 2016/08/02 14:44 by 192.168.242.36
 
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