Re: [Valgrind-users] Valgrind getting stuck or hung

[Richa M. <ric...@gm...>]

Hi the output of valgrind ls -l is:



************************************************************************************************************
[172:~]$ /usr/bin/valgrind ls -l
==2096== Memcheck, a memory error detector
==2096== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==2096== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==2096== Command: ls -l
==2096==
total 5296
-rwxr-xr-x 1 root root    2119 Feb 17 20:21 STARTMYPROC
-rwxr-xr-x 1 root root 3107672 Feb 17 20:21 _mydope.so
-rwxr-xr-x 1 root root   23211 Feb 17 20:21 mydope.py
-rwxr-xr-x 1 root root   23173 Feb 17 21:21 mydope.pyo
-rwxrwxr-- 1 root root    3432 Feb 20 21:01 stack-mgr.log
-rwxr-xr-x 1 root root   23859 Feb 17 20:21 stack_mgr.py
==2096== Invalid free() / delete / delete[]
==2096==    at 0x48CE3E8: free (replace_malloc.c:366)
==2096==    by 0x4A10B1B: free_mem (in /mylib/libc-2.11.1.so)
==2096==    by 0x4A10659: __libc_freeres (in /mylib/libc-2.11.1.so)
==2096==    by 0x48C8493: _vgnU_freeres (preloaded.c:62)
==2096==    by 0x4996AA7: _Exit (_exit.S:30)
==2096==  Address 0x48cae00 is not stack'd, malloc'd or (recently) free'd
==2096==
==2096==
==2096== HEAP SUMMARY:
==2096==     in use at exit: 12,656 bytes in 20 blocks
==2096==   total heap usage: 105 allocs, 86 frees, 23,131 bytes allocated
==2096==
==2096== LEAK SUMMARY:
==2096==    definitely lost: 0 bytes in 0 blocks
==2096==    indirectly lost: 0 bytes in 0 blocks
==2096==      possibly lost: 0 bytes in 0 blocks
==2096==    still reachable: 12,656 bytes in 20 blocks
==2096==         suppressed: 0 bytes in 0 blocks
==2096== Rerun with --leak-check=full to see details of leaked memory
==2096==
==2096== For counts of detected and suppressed errors, rerun with: -v
==2096== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 22 from 9)
[172:~]$
******************************************************************************************************************

This shows that valgrind is working properly....





On Wed, Feb 22, 2012 at 7:12 PM, David Chapman <dcc...@ac...> wrote:

>  On 2/22/2012 6:43 PM, Richa Mehta wrote:
>
> Hi,
>
>  The valgrind version is:  *valgrind-3.6.1*
> and the Linux OS is based off of: *montavista*
>
> I first connect to a virtual machine (VM), boot up my build image without
> starting any services.
> Then I run valgrind on my process, (only after starting all the services
> on which my process is dependent, so there is no dependency issue)
> Now, once the valgrind runs, it gets hung.
>
> I tried using all the flags including -d, -v, --leakcheck, etc
> once it gets hung, I am not even able to access the log file.
>
>  I also tried to ssh to the vm which runs valgrind and the only thing I
> could figure out fro it is 2 to 3 processes taking more space...
> I don't think this will be of any help
>
>  Can u plz guide me as to how to access the log file of valgrind, once it
> gets hung. Atleast that might give me some info as to which thread is
> causing the problem.
>
>
> What happens if you launch valgrind on the command "ls -l"?  Does valgrind
> fail every time on the VM, or just on your program?
>
> --
>     David Chapman      dcc...@ac...
>     Chapman Consulting -- San Jose, CA
>     Software Development Done Right.
>     www.chapman-consulting-sj.com
>
>


-- 
*Regards*
*Richa Mehta*
*MS, Computer Engineering*
*Santa Clara University*