[omniORB] Re: Testing OmniORB4 for memory leaks on Linux RH9 w/ valgrind

[Visscher, Bruce]

> -----Original Message-----
> From: Sean Parker [mailto:supinlick at yahoo.com]
> Sent: Wednesday, June 08, 2005 11:26 PM
> To: Visscher, Bruce; omniorb-list at omniorb-support.com
> Subject: RE: [omniORB] Re: Testing OmniORB4 for memory leaks on Linux
> RH9 w/ valgrind
> 
> 
> Hello - 
> 
>   I've finally had a chance to revisit the 'memory' - and
> I've run valgrind, and found no leaks/errors for simply
> bringing up the orb and then destroying it.
> 
>   However when I add activating-the-POA, I get these two
> kinds of errors from valgrind:
> 
>   1) leak of ~8160 bytes due to pthread

Sounds like a Linux pthreads issue to me.  Do you loose 8K for each
thread allocated?  If that isn't the case, then maybe it's just
a one time allocation so doesn't really qualify as a leak.

>   2) several "use of uninitialized bytes"

I'm not familiar with valgrind, but a couple of places where these
are reported frequently are:

(1) Complete red herring.  E.g., instances of std::allocator which
should really be empty but (depending on the implementation of both
the compiler and the library) are not optimized away.  Of course,
omniORB doesn't utilize std::allocator so this has nothing to do
with omniORB.  But it could be something similar.

(2) Part of the IOR used to be uninitialized memory.  iirc, it was
part of the "private" section of the stringified IOR so it can be
anything the implementation desires.

I am actually glad that I wasn't able to completely dissuade you from
pursuing this.  Just thought you should know you're not the first
to think about this.  Maybe you will find a bug no one else has.

Bruce

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