Hi,
On 04/14/2010 03:50 PM, jody wrote:
> Hi
>
> It is very well possible that openpty itself has a leak.
> It is quite common that library functions don't clean up nicely after
> their work is done...
Heh, if that is the case, I might submit a bug to library developer
then. But it's really common to use openpty in such way, so I wonder if
I am wrong first.
> jody
>
> On Wed, Apr 14, 2010 at 9:15 AM, Zhenhua Zhang<zhenhua.zh...@intel.com>
> wrote:
>> Hi,
>>
>> Valgrind reports definitely lost memory leak when I am invoking
>> openpty(). Could some one tell me whether it is a bug in valgrind or my
>> mistake in using openpty? Thanks.
>>
>> My program is:
>> #include<unistd.h>
>> #include<glib.h>
>> #include<stdio.h>
>> #include<stdlib.h>
>> #include<utmp.h>
>> #include<pty.h>
>>
>> int main(int argc, char **argv)
>> {
>> int master, slave;
>>
>> if (openpty(&master,&slave, NULL, NULL, NULL)< 0)
>> return -1;
>>
>> close(master);
>> close(slave);
>>
>> return 0;
>> }
>>
>> $ valgrind --leak-check=full ./test
>> ==25001== Memcheck, a memory error detector
>> ==25001== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
>> ==25001== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
>> ==25001== Command: ./test
>> ==25001==
>> ==25001==
>> ==25001== HEAP SUMMARY:
>> ==25001== in use at exit: 160 bytes in 11 blocks
>> ==25001== total heap usage: 67 allocs, 56 frees, 5,594 bytes allocated
>> ==25001==
>> ==25001== 160 (40 direct, 120 indirect) bytes in 1 blocks are definitely
>> lost in loss record 11 of 11
>> ==25001== at 0x4024C6C: malloc (vg_replace_malloc.c:195)
>> ==25001== by 0x41D8323: nss_parse_service_list (nsswitch.c:622)
>> ==25001== by 0x41D8A68: __nss_database_lookup (nsswitch.c:164)
>> ==25001== by 0x4672F2B: ???
>> ==25001== by 0x4673A24: ???
>> ==25001== by 0x418F954: getgrnam_r@@GLIBC_2.1.2 (getXXbyYY_r.c:253)
>> ==25001== by 0x41FB2FE: __unix_grantpt (grantpt.c:138)
>> ==25001== by 0x41FB588: grantpt (grantpt.c:84)
>> ==25001== by 0x40F7021: openpty (openpty.c:102)
>> ==25001== by 0x804A0E4: main (test-server2.c:40)
>> ==25001==
>> ==25001== LEAK SUMMARY:
>> ==25001== definitely lost: 40 bytes in 1 blocks
>> ==25001== indirectly lost: 120 bytes in 10 blocks
>> ==25001== possibly lost: 0 bytes in 0 blocks
>> ==25001== still reachable: 0 bytes in 0 blocks
>> ==25001== suppressed: 0 bytes in 0 blocks
>> ==25001==
>> ==25001== For counts of detected and suppressed errors, rerun with: -v
>> ==25001== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 25 from 8)
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
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>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
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------------------------------------------------------------------------------
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Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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