KMLM List

[Martin Janssen <Martin.Janssen@xxxxxxxxxxxx>]

Hi Sven,

This is indeed a bug in SystemC (no unregistering of requested updates
when a primitive channel --signal-- is destructed).
Thanks for reporting and for providing a testcase.

Martin
-oo-


Sven Heithecker wrote:

> Am Donnerstag, 25. April 2002 09:54 schrieb Martin Janssen:
>
>
> > Please send a (small if possible) testcase and please also provide
> > the information on SystemC version, compiler, and OS you are using.
>
> Ok, first I have to admit that I had used that signal (sorry) - but I only 
> assigned a value to it, no more usage (reading that signal, binding to a 
> port, ...) otherwise. Here is the test case:
>
> #include "systemc.h"
>
> SC_MODULE(mod)
>  {
>   public:
>   SC_CTOR(mod)
>    {
>     // The following two statements are complete useless, but they IMHO really
>     // dont look harmful at all.
>     // However, this causes a crash. Removing the assignemt removes the crash.
>     sc_signal<bool> bogus_signal;
>     bogus_signal = true;
>    }
>  };
>
> int sc_main(int argc, char **argv)
>  {
>   mod dut("dut");
>   sc_start(10);
>   return(EXIT_SUCCESS);
>  }
>
> And this is the resulting stack trace:
>
> #0  0x0 in ?? ()
> #1  0x8092129 in sc_prim_channel::perform_update (this=0xbffff214)
> #2  0x80904a1 in sc_prim_channel_registry::perform_update (this=0x80d5008)
> #3  0x80534af in sc_simcontext::initialize (this=0x80d4d60, no_crunch=true)
> #4  0x80536e9 in sc_simcontext::simulate (this=0x80d4d60,duration=@0xbffff304)
> #5  0x805482a in sc_start (duration=@0xbffff304)
> #6  0x808b816 in sc_start (duration=10)
> #7  0x8049763 in sc_main (argc=1, argv=0xbffff444)
> #8  0x804a4db in main (argc=1, argv=0xbffff444)
> #9  0x40089c5f in __libc_start_main () from /lib/libc.so.6
>
> I am using SystemC V2.0 with the gcc 2.95.3 under linux (kernel 2.4.8).
>
> Regards, Sven