issues with valgrind in Fedora 15
Marcos Luis Ortiz Valmaseda
marcosluis2186 at googlemail.com
Thu Jul 28 00:36:01 UTC 2011
Here is a excelent compilation of the most used commands with Valgrind
http://techtalkies.blogspot.com/2011/06/valgrind-cheat-sheet-notes.html
Regards
2011/7/27 Marcos Luis Ortiz Valmaseda <marcosluis2186 at googlemail.com>
> Are you using the same valgrind version on both systems?
> Use this line to obtain a more detailed output:
>
> valgrind --leak-check=yes myprog arg1 arg2
>
>
>
> 2011/7/27 Ranjan Maitra <maitra at iastate.edu>
>
>> Hi,
>>
>> I have been trying to use valgrind with Fedora 15 and I find that I am
>> not getting the complete backtrace information. Let me provide a simple
>> example:
>>
>> /* file test.c */
>>
>> #include <stdio.h>
>>
>> int main(void) {
>> int i;
>> fprintf(stderr, "i = %d\n", i);
>> } /* main */
>>
>>
>> Compile with:
>>
>> gcc -o -g test test.c
>>
>>
>> Then I run valgrind on Fedora 15, and here is what I get. (I also
>> provide the output for Ubuntu 10.04 for comparison.) How can I get more
>> complete backtrace information using Fedora?
>>
>> (Not that I am not interested in debugging the above sample program, but
>> for finding out why valgrind for me does not provide more complete
>> backtrace information.)
>>
>> Thanks a lot in advance!
>>
>> Best wishes,
>> Ranjan
>>
>> Output of valgrind on Fedora 15:
>>
>> $ valgrind ./test
>>
>> ==31745== Memcheck, a memory error detector
>> ==31745== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
>> ==31745== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright
>> info
>> ==31745== Command: ./test
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x35: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x35: ???
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x3630: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x3630: ???
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x363136: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x363136: ???
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x36313732: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x36313732: ???
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x31373334: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x31373334: ???
>> ==31745==
>> ==31745== Use of uninitialised value of size 4
>> ==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x37333532: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
>> ==31745== by 0x37333532: ???
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692D177: vfprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x46930D7A: buffered_vfprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x469367AE: fprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x46903412: (below main) (in /lib/libc-2.14.so)
>> ==31745==
>> ==31745== Conditional jump or move depends on uninitialised value(s)
>> ==31745== at 0x4692CCD1: vfprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x46930D7A: buffered_vfprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x469367AE: fprintf (in /lib/libc-2.14.so)
>> ==31745== by 0x46903412: (below main) (in /lib/libc-2.14.so)
>> ==31745==
>> i = 1185353716
>> ==31745==
>> ==31745== HEAP SUMMARY:
>> ==31745== in use at exit: 0 bytes in 0 blocks
>> ==31745== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
>> ==31745==
>> ==31745== All heap blocks were freed -- no leaks are possible
>> ==31745==
>> ==31745== For counts of detected and suppressed errors, rerun with: -v
>> ==31745== Use --track-origins=yes to see where uninitialised values come
>> from
>> ==31745== ERROR SUMMARY: 22 errors from 16 contexts (suppressed: 12 from
>> 8)
>>
>>
>>
>> Output of valgrind on Ubuntu 10.04:
>>
>> ==29914== Memcheck, a memory error detector
>> ==29914== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
>> ==29914== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for
>> copyright info
>> ==29914== Command: ./test
>> ==29914==
>> ==29914== Use of uninitialised value of size 8
>> ==29914== at 0x4E71E4B: _itoa_word (_itoa.c:195)
>> ==29914== by 0x4E73138: vfprintf (vfprintf.c:1613)
>> ==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
>> ==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
>> ==29914== by 0x4E7D497: fprintf (fprintf.c:33)
>> ==29914== by 0x40058A: main (test.c:5)
>> ==29914==
>> ==29914== Conditional jump or move depends on uninitialised value(s)
>> ==29914== at 0x4E71E55: _itoa_word (_itoa.c:195)
>> ==29914== by 0x4E73138: vfprintf (vfprintf.c:1613)
>> ==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
>> ==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
>> ==29914== by 0x4E7D497: fprintf (fprintf.c:33)
>> ==29914== by 0x40058A: main (test.c:5)
>> ==29914==
>> ==29914== Conditional jump or move depends on uninitialised value(s)
>> ==29914== at 0x4E74FB1: vfprintf (vfprintf.c:1613)
>> ==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
>> ==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
>> ==29914== by 0x4E7D497: fprintf (fprintf.c:33)
>> ==29914== by 0x40058A: main (test.c:5)
>> ==29914==
>> ==29914== Conditional jump or move depends on uninitialised value(s)
>> ==29914== at 0x4E73226: vfprintf (vfprintf.c:1613)
>> ==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
>> ==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
>> ==29914== by 0x4E7D497: fprintf (fprintf.c:33)
>> ==29914== by 0x40058A: main (test.c:5)
>> ==29914==
>> i = 0
>> ==29914==
>> ==29914== HEAP SUMMARY:
>> ==29914== in use at exit: 0 bytes in 0 blocks
>> ==29914== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
>> ==29914==
>> ==29914== All heap blocks were freed -- no leaks are possible
>> ==29914==
>> ==29914== For counts of detected and suppressed errors, rerun with: -v
>> ==29914== Use --track-origins=yes to see where uninitialised values come
>> from
>> ==29914== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 4 from 4)
>>
>>
>> --
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>
>
>
> --
>
> --
> Marcos Luis Ortíz Valmaseda
> Software Engineer (UCI)
> Linux User # 418229
> http://marcosluis2186.posterous.com
> https://fedoraproject.org/wiki/User:Marcosluis
>
--
--
Marcos Luis Ortíz Valmaseda
Software Engineer (UCI)
Linux User # 418229
http://marcosluis2186.posterous.com
https://fedoraproject.org/wiki/User:Marcosluis
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