RE: Ctrl-C interrupt

[Fabrice Gautier <Fabrice_Gautier at sdesigns dot com>]

Hi,

Nobody has some "insight" about that ?

Thanks.

> -----Original Message-----
> From: Fabrice Gautier [mailto:Fabrice_Gautier@sdesigns.com]
> Sent: Friday, November 10, 2000 5:39 PM
> To: 'insight@sources.redhat.com'
> Subject: Ctrl-C interrupt
> 
> 
> Hi,
> 
> I'm using gdb (insight)  to debug an eCos program running 
> above RedBoot. I
> have a problem when running some test program to make the ctrl-C works
> correctly. The target is a remote i386 PC.
> 
> My program only do some printf (which are sent to gdb as O 
> packets) in a
> loop wiht some delay betwen the printfs. 
> 
> What happenif that I can interrupt with Ctrl-C a first time, then if I
> continue Ctrl-C doesn't work again immediately, i have to 
> wait for another
> printf (and so a O packet) in order to be abble to use ctrl-C again.
> 
> This happen only when using Ethernet not when debugging 
> through serial port.
> 
> I first thought it was a problem  with the gdb stub in 
> RedBoot/eCos. But
> when I "set remote debug 1" i can see that the first time i 
> hit ctrl-C i
> have:
> 
> remote_interrupt called
> remote_stop called
> 
> but the second time (when it doesn't works) i have nothing. 
> So it looked
> like the SIGINT didn't reach the correct gdb function somewhere. 
> 
> 
> I have been looking a bit in the gdb code to figure out what 
> was the path
> when receving a ctrl-C, but i'm not sure which function 
> exaclty is called.
> remote_interrupt or async_remote_interrupt (which) seems to 
> be called when
> it works, but i've also seen some SIGINT handling with 
> handle_remote_sigint
> or request_quit.
> 
> Okay,
> All of the above, i've already sent to the gdb list, but i 
> figured out that
> with the insight STOP button i've somthing a bit different:
> 
> When I press the button nothing happen until something is 
> printf'ed then the
> SIGINT is received. When i only use the command line, the 
> SIGINT is never
> caught if i don't retype ctrl-C after the printf.
> 
> I suspect this may have something to do - in part - with terminals.
> 
> Plus, what i forgot to says previously was that it is the 
> cygwin version of
> gdb-insight that I use. The cygwin console may be different 
> than the usual
> unix/linux consoles.
> 
> Thanks
> 
> -- 
> Fabrice Gautier
> fabrice_gautier@sdesigns.com 
> 
>