Re: questions about rtai-lab and qrtailab

All the same. I tried both ways.


So why don't we just add a null pointer guard ?  It is a good programming practice.


tom@shanghai


At 2017-10-17 14:54:02, "Paolo Mantegazza" <[email protected]> wrote:

As a further clue, are you setting it as local host, i.e.  127.0.0.1, ore as 0? In the case you are using 127.0.0.1 can you try and see what happens by using 0?

Paolo

On 10/17/2017 02:58 AM, Tom wrote:

I am using it locally. 


host  i5-6200  64bit cpu
virtualbox 5.1.14 
ubuntu14.04 
gcc 4.8.4


it will core-dump here 


int QRtaiLabCore::connectToTarget()
{
char buf[128];
sprintf(buf, "Trying to connect to %s", targetthread->getPreferences().Target_IP);
statusBarMessage(tr(buf));
qrl::RT_RPC(targetthread->getTask(), TargetThread::CONNECT_TO_TARGET, 0);


tom@shanghai


在 2017-10-16 18:23:17，"Paolo Mantegazza" <[email protected]> 写道：

On 10/16/2017 11:17 AM, Tom wrote:

From


https://www.rtai.org/userfiles/downloads/RTAILAB/qrtailab-0.1.12.tar.bz2


Qrtailab has been used because of the EFLTK troubles in setting RTAILab on 64 bits machines. A few fixes have made it work reliably for our application at hand, but we are not yet at ease with its internals.

Then is something that should be cared of. I see that RT_RPC is systematically called  with a null pointer, nonetheless no crash happens in the use I'm seeing at work here around.

How are you using it (locally vs distributed).Do you witness any crash without the fix you are pointing at?

Paolo





At 2017-10-16 17:00:49, "Paolo Mantegazza" <[email protected]> wrote:

I'll pass the question to the scicoslab interface expert.
On my side I would like to know where did you take qrtailab from?
Paolo

On 10/16/2017 10:02 AM, Tom wrote:

Hi, all


I am new to rtai and trying to use rtai-lab with scicoslab.  
Config: 
linux 3.18.20  
rtai 5.0.1  
scicoslab 4.4.1 
qrtailab-0.1.12 


I think function `set_double' in rtmain44.c goes wrong when running on x86_64 arch.
  unsigned long l = ((unsigned long *)from)[0];
  unsigned long h = ((unsigned long *)from)[1];
because unsigned long would take 8 bytes.


And I think there should be a null pointer guard before assignment in qrtailab/src/qrtailab.h  line 115  function RT_RPC
*reply = (unsigned int)ret;
to 
if (reply) 
        {
              *reply = (unsigned int)ret;
        }


regards.


tom@shanghai



【网易自营】好吃到爆！鲜香弹滑加热即食，经典13香/麻辣小龙虾仅75元3斤>>      



_______________________________________________
Rtai mailing list
[email protected]://mail.rtai.org/cgi-bin/mailman/listinfo/rtai







【网易自营】好吃到爆！鲜香弹滑加热即食，经典13香/麻辣小龙虾仅75元3斤>>      







【网易自营】好吃到爆！鲜香弹滑加热即食，经典13香/麻辣小龙虾仅75元3斤>>

_______________________________________________
Rtai mailing list
[email protected]
https://mail.rtai.org/cgi-bin/mailman/listinfo/rtai