Re: [Valgrind-users] Is valgrind capable of checking leaks for shared memory.

[Mark S. <mar...@ap...>]

Hi,

A few months ago I was given with a similar task, and decided mempools
were the best course of action. I would create and destroy mempools as
SHM was attached and detached from the process. The program would then
use its own memory allocation from the shared memory, so
VALGRIND_MEMPOOL_ALLOC and VALGRIND_MEMPOOL_FREE were used where needed.

At the time memcheck would not leak-check mempools so I needed a patch
by Robert Walsh (mempool.diff at
http://valgrind.org/downloads/variants.html?rjw) and then had to create
my own patch on top of that
(http://www.markshinn.co.uk/valgrind/mempoolleakcheck.patch). Its a few
months since I did this, so the latest release may handle mempools fully
- I last worked on this on 13/01/06, so I can't say how my patch will
cope with the current SVN head.

This could be more complex than you require, but I hope it helps...

Mark



Mark Shinn
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-----Original Message-----

Message: 2
Date: Fri, 28 Apr 2006 10:55:48 +0100
From: Bryan Meredith <om...@br...>
To: M Mohan-A19706 <mo...@mo...>
CC:  val...@li...
Subject: Re: [Valgrind-users] Is valgrind capable of checking leaks for
shared
 memory.

Hi,

at a guess, I would say that running your programs as two threads in a=20
single process and marking the shared memory pointer with=20
MALLOCLIKE_BLOCK and then FREELIKE_BLOCK when you free it could well be=20
what you are looking for.

See the docs and valgrind.h for the macros you need.

You may also want to have a look at my omega tool:=20
http://www.brainmurders.eclipse.co.uk/omega.html
but it is still in beta. The choice is yours.

hope this helps,
Bryan "Brain Murders" Meredith


M Mohan-A19706 wrote:
> Hi All,
>=20
> I have two application where one process allocates shared memory and
> other process uses it and free the memory vica-versa.
>=20
> Does valgrind support here to check for memory leaks?
>=20
> Basically if valgrind supports checking leaks for shared memory then I
> can start these two process as single process with two different
threads
> to test leaks.
>=20
> Please help me here.
>=20
> Thanks
> Mohan M
>=20
>=20
>