[Klone-users] Memory Leak in uClinux

[moises acuna]

Hi Steven and Steven,
Thankfully the bug was simpler than I was expecting, it was an issue with
the version 2.0.2, i upgrated to v 2.1.1rc10 and the wrong behauviour
stopped. Just for documentation: was this any known issue ?
Thank you very much for your help.

2009/8/14 Steven Dorigotti <dorigotti at koanlogic.com>

> Hello Moises,
>
>   what you are seeing is a one-time leak upon initialisation of the
> embedded file system.
>
>   So it is not connected to the problems you are having upon refresh.
> Either:
>
> - some info is missing (did you run your full previous test case, with
> refreshes, under valgrind?);
> - or the problems you are
> having might be caused by something external (e.g. uclibc problem which
> causes kloned process to grow).
>
>   Do you have a reference linux distribution with that version of uclinux,
> so we can find an iso (or is it custom)? Any other info?
>
> cheers,
> sd
>
>
> On 12/ago/09, at 19:54, moises acuna wrote:
>
> Hi Steven,
> thanks for the response.
> first i tried with a reduced version of the project, but it's still growing
> with every refresh. So i tried it with Valgrind and it seems that the leak
> is in some KLone files.
> this is the report:
>
> --3673-- supp:     21 dl-hack3-1
> ==3673== malloc/free: in use at exit: 1,996 bytes in 99 blocks.
> ==3673== malloc/free: 8,305 allocs, 8,206 frees, 5,136,560 bytes allocated.
> ==3673==
> ==3673== searching for pointers to 99 not-freed blocks.
> ==3673== checked 331,292 bytes.
> ==3673==
> ==3673== 1,988 (1,808 direct, 180 indirect) bytes in 89 blocks are
> definitely lost in loss record 3 of 3
> ==3673==    at 0x4021BDE: calloc (vg_replace_malloc.c:397)
> ==3673==    by 0x80953D9: u_zalloc (memory.c:63)
> ==3673==    by 0x80910CC: u_hmap_o_new (hmap.c:1072)
> ==3673==    by 0x8075D9E: emb_register (emb.c:69)
> ==3673==    by 0x807F926: module_init_2c8d30e5acaba22237ea983216ef3130
> (pg_2c8d30e5acaba22237ea983216ef3130.c:50)
> ==3673==    by 0x807AA41: do_register (register.c:22)
> ==3673==    by 0x807AA29: register_pages (register.c:9)
> ==3673==    by 0x8075BA1: emb_init (emb.c:32)
> ==3673==    by 0x8050C3D: app_init (main.c:96)
> ==3673==    by 0x805130C: main (entry.c:397)
> ==3673==
> ==3673== LEAK SUMMARY:
> ==3673==    definitely lost: 1,808 bytes in 89 blocks.
> ==3673==    indirectly lost: 180 bytes in 9 blocks.
> ==3673==      possibly lost: 0 bytes in 0 blocks.
> ==3673==    still reachable: 8 bytes in 1 blocks.
> ==3673==         suppressed: 0 bytes in 0 blocks.
>
>
>
>
> by 0x807F926: module_init_2c8d30e5acaba22237ea983216ef3130
> (pg_2c8d30e5acaba22237ea983216ef3130.c:50)
>
> this one is generated in the site. It says that the leak is in this
> function:
>
> void module_init_2c8d30e5acaba22237ea983216ef3130(void)
> {
>     res_ctor();
>     emb_register((embres_t*)&e);
> }
>
> i don't know if this is some kind of a bug or something.
>
> The problem here is that the kloned process in the uCLinux is growin and
> growing with every refresh and after 3 days running the server will have an
> stack overflow or something. This doesn't happen in Ubuntu.
>
> Thanks for any help with this.
>
>
>
> 2009/8/11 Steven Van Ingelgem <steven at vaningelgem.be>
>
>> You can try running it through valgrind:
>>
>> valgrind -v --leak-check=full ./kloned
>>
>>
>> After you have done running the pages, you can see if it is truly a leak
>> or not.
>>
>>
>> --
>> Steven
>> www.salvania.be
>>
>> 2009/8/12 moises acuna <moises.acuna at gmail.com>
>>
>>>  Hello everyone,
>>> i'm having trouble with the Klone server over uClinux. The kloned process
>>> memory allocation is getting bigger and bigger every refresh of a page (i
>>> have an option in a page to turn on or off an every-5-seconds-autorefresh),
>>> but this happens only in uClinux , with Linux( Ubuntu 8.04) this doesn't
>>> happens. The process stays stable there. I've been trying to manage the
>>> memory for arrays and everything the best way possible and not leaving any
>>> pointer hanging. Have you ever had a problem like this. Am I missing
>>> something. Thanks for any help.
>>>
>>> pd. the uclinux version is  v3.2.0.ANI0803
>>>
>>>
>>>
>>> --
>>> Moisés AAC
>>>
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>>> Klone-users at koanlogic.com
>>> http://koanlogic.com/cgi-bin/mailman/listinfo/klone-users
>>>
>>>
>>
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>>
>
>
> --
> Moisés AAC
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-- 
Moisés AAC
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