Segfaults while calling Rpc_methods from client.h

[Aditya Kousik]

Hello Norman,

This documentation is quite exquisite, I'm just laying my eyes on it. Are
there any implementation examples to support the sequence diagrams? They'll
help map the theory to the implementation.

Cheers,
Aditya

On Mon, May 11, 2015 at 2:02 PM, Norman Feske <norman.feske at ...1...>
wrote:

> Hi Aditya,
>
> passing non-POD objects such as connected lists, maps, etc. as RPC
> arguments is not supposed to work. The reason is that a pointer with a
> meaning in one address space is meaningless in another address space.
> Please refer to the Section 8.12 of the manual [1] and particularly
> Section 8.12.2 for more details about the RPC mechanism.
>
> To transfer bulk data from one component to another, you may need to
> manually serialize your information to a shared memory buffer, to be
> picked up on the receiving side. See section 3.6 for the various
> approaches of inter-component communication.
>
> [1]
>
> http://genode.org/files/53bcb8e33fe6602fed25edc3c7b922c5/manual-2015-04-27.pdf
>
> Cheers
> Norman
>
> On 05/11/2015 10:49 PM, Aditya Kousik wrote:
> > Hello,
> >
> > Calling Rpc_<method>(args, ...) from Session_client causes segfault 11
> > when I try to pass anything other than a default datatype. I'm trying to
> > pass an object of std::string, and it prints the string inside the
> > <method> just fine, but when I make the call<Rpc_method>(st), it breaks.
> >
> > I tried working around this by creating a char* pointer instead. Print
> > inside this method works and the rpc to session_component method also
> > reaches, but whatever pointer I receive in the session_component is
> > garbage data. How do I fix the RPC calls?
> >
> > Thanks,
> > Aditya.
>
> --
> Dr.-Ing. Norman Feske
> Genode Labs
>
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