Memory leak in pthread

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# 1  
Old 10-12-2007
Question Memory leak in pthread

helo frnds,

I am using RHEL5 and C lang for development.

I am getting some memory leak problem in pthread.

I hav developed a program which creates two threads for listening purpose on two diff ports. both the child threads are doing same job but on diff port no.

I am using pthread_create(), pthread_join() and pthread_kill() thread routines in my program. and wen I checked my program using valgrind tool it gives me some memory leak.

The memory leak occures in libpthread.

so is there any routine to cleanup the thread memory [eg. like pthread_destory()]

following are some lines of out put of valgrind
272 bytes in 2 blocks are possibly lost in loss record 5 of 7
at 0x40046FF: calloc (vg_replace_malloc.c:279)
by 0x446479E9: _dl_allocate_tls (in /lib/
by 0x447C79D6: pthread_create@@GLIBC_2.1 (in /lib/
by 0x80488BD: main (sigThread.c:50)

definitely lost: 0 bytes in 0 blocks.
possibly lost: 272 bytes in 2 blocks.
still reachable: 1,928 bytes in 6 blocks.
suppressed: 0 bytes in 0 blocks.
Reachable blocks (those to which a pointer was found) are not shown.
To see them, rerun with: --show-reachable=yes

Last edited by mindTeaser; 10-12-2007 at 07:42 AM..
# 2  
Old 10-13-2007
Look for upgrade availability

Look RedHat upgrade site if there is glibc upgrade available
# 3  
Old 05-13-2009
hi mindteaser,

Is that memory leak problem in pthread overcomed in any of the new library releases??
# 4  
Old 05-15-2009
What makes you think you are getting an actual memory leak? All valgrind is saying is that you MAY have a possible memory leak.
# 5  
Old 05-18-2009
hi murphy,

thanks for ur reply.
Actually my question was about "Still reachable bytes". please see my thread named "Memory leak while using pthread_cancel() ", posted 5 days ago. there you can see my sample code and valgrind output.

thank you.
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