Re: [Gems-users] ctrl+C does not interrupt the simulation

[Philip Garcia <pcgarcia@xxxxxxxx>]

I had this same issue a while back when I switched to using Simics  
3.0.  An unsupported workaround to this is to install your own ctrl-c  
signal handler into opal/system/system.C .
I can't say exactly what the changes are, as I don't know offhand  
which stuff I've added to system.C and what is in the vanilla system.C
Adding the signal handler itself is pretty easy, I just include the  
file  #include <signal.h>
I also added the following function into system.C (not as a method of  
the class, just a plain C function):
void SignalInt(int sig)
{
  signal (sig,SIG_IGN); //ignore the signal
  //HaltSimulation("hit control-c");
  HALT_SIMULATION;
  signal(SIGINT,SignalInt);
}

Then in the system_t constructor class, i register my signal handler  
with opal using:
signal(SIGINT,SignalInt);

This should allow ctrl-C events to halt opal.  I'm not sure why opal  
no longer gets the SIGINT signal from simics.  The simics forum said  
something about how they don't know what would happen if you add your  
own signal handler (like I did), but this method has worked pretty  
well for me.
Phil

On Oct 13, 2009, at 2:27 AM, Mahmood Naderan wrote:

> Hi,
> I have followed the instructions to start a simulation. After
> successfully loading ruby and opal, I ran these commands:
> simics> ruby0.setparam g_NUM_PROCESSORS 1
> simics> ruby0.setparam g_MEMORY_SIZE_BYTES 4294967296
> simics> ruby0.init
> simics> opal0.init
> simics> opal0.simstart "results.opal"
>
> Now at this point I ran  simics> opal0.simstep 10000000000, and it
> seems the simulation starts, but I am not able to interrupt it with
> ctrl+C (!). pressing ctrl+C results in displaying ^C character only.
> How can I stop it?
>
> Thanks,
> _mnaderan_
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