[openib-general] Segmentation fault when calling osmv_get_query_svc_rec()

[Hal Rosenstock]

On Wed, 2006-11-22 at 06:22, Steven Wooding wrote:
> Hi Hal,
>  
> The debugger reveals that the pointer p_sa_mad is equal to 0xffffffff.
> When the osmv_get_query_result() returns it tries to use
> p_sa_mad->data and that's what causes the seg fault.
>  
> I also noticed that mad_size=0 in the osm_madw_t structure.
>  
> What could have caused this to only happen in my user code?

Do you return the MADs to the mad pool ? 

Have you looked at osmtest for how to use the SA client interface ?

-- Hal

>  
> Cheers,
>  
> Steve.
> 
>  
> On 21 Nov 2006 12:38:11 -0500, Hal Rosenstock <halr at voltaire.com>
> wrote: 
>         On Tue, 2006-11-21 at 12:09, Steven Wooding wrote:
>         > Hi,
>         >
>         > I've come across a problem with my code when doing a Service
>         Record 
>         > lookup. It's all fine until I call osmv_get_query_svc_rec(),
>         which
>         > then calls osmv_get_query_result(). The segmentation fault
>         then occurs
>         > on the return line.
>         >
>         > I'm using OFED release 1.0 (I tried upgrading to 1.1, but
>         that fails
>         > to build, complaining about the C++ preprocessor "/lib/cpp"
>         failing
>         > it's sanity check).
>         >
>         > A run of "osmtest -f s" works fine, so it is something in my
>         code. 
>         >
>         > Can anybody suggest what I can do next to solve this
>         problem?
>         
>         Look at it with the debugger to see why it is seg faulting.
>         That might
>         provide a clue as to what is going wrong.
>         
>         -- Hal
>         
>         >
>         > Thanks a lot.
>         >
>         > Cheers,
>         >
>         > Steve.
>         >
>         > PS. System is RHEL4, with Intel Compiler.
>         >
>         >
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