Valgrind and Python

annonymous c0oncrete at yahoo.com
Sat Nov 10 04:18:46 CET 2007


on 11/10/2007 08:38 AM Esa A E Peuha wrote :
> Running Python 2.5.1 under Valgrind is interesting; just starting it and
> then pressing Ctrl-D produces this:
> 
> ==27082== ERROR SUMMARY: 713 errors from 56 contexts (suppressed: 10 from 1)
> ==27082== malloc/free: in use at exit: 1,243,153 bytes in 508 blocks.
> ==27082== malloc/free: 3,002 allocs, 2,494 frees, 2,748,487 bytes allocated.
> ==27082== For counts of detected errors, rerun with: -v
> ==27082== searching for pointers to 508 not-freed blocks.
> ==27082== checked 1,399,984 bytes.
> ==27082== 
> ==27082== LEAK SUMMARY:
> ==27082==    definitely lost: 0 bytes in 0 blocks.
> ==27082==      possibly lost: 17,072 bytes in 58 blocks.
> ==27082==    still reachable: 1,226,081 bytes in 450 blocks.
> ==27082==         suppressed: 0 bytes in 0 blocks.
> ==27082== Reachable blocks (those to which a pointer was found) are not shown.
> ==27082== To see them, rerun with: --show-reachable=yes
> 
> A lot of those 713 errors occur in the various deallocation functions.
> 

really wired!!! i tried  valgrind --leak-check=yes python on Python 2.4.3

it showed me even 839 errors,

==4375== ERROR SUMMARY: 839 errors from 108 contexts (suppressed: 38 from 1)
==4375== malloc/free: in use at exit: 710,604 bytes in 242 blocks.
==4375== malloc/free: 1,971 allocs, 1,729 frees, 1,541,112 bytes allocated.
==4375== For counts of detected errors, rerun with: -v
==4375== searching for pointers to 242 not-freed blocks.
==4375== checked 626,920 bytes.


I didn't get any error when using valgrind with perl or php!!!!

does that mean that python's interpretor is a memory beast?




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