Re: automated warning notifications

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On Fri, Jun 15, 2012 at 02:19:14PM +0300, Dan Carpenter wrote:
> On Fri, Jun 15, 2012 at 06:40:51AM -0400, Julia Lawall wrote:
> > > > Eventually I think we will want to set up a mailing list for this or
> > > > we will start sending duplicate messages.
> > >
> > > Fair enough. How can we setup the mailing list? Once the list up, it
> > > would be trivial for me to send sparse warnings out there.
> > 
> > I'm not completely sure that a mailing list would completely eliminate
> > duplicate messages.  But still, it could be the place for people who are
> > interested in seeing such messages to go to, so it seems like a good
> > thing.  I would be happy to contribute content :)
> 
> Yeah.  That might be interesting.  If you don't know whether a bug
> is a false positive or not you could submit it to the list for
> people to look at.
> 
> I don't know if anyone will actually look at them.  I had been
> planning to filter them to a mail box and automatically ignore
> anything that was a duplicate.  But it might actually be worth
> looking at them as well.  Especially if you email had enough useful
> context so I could tell from the message what the bug is.
> 
> Probably we could use something like the attached script to print
> out the line of code which causes the bug and some other script to
> querry git blame and attach the offending commit?

cat -n $code_file | tail -n +$(($lineno - (($context + 1) / 2))) | head -n $(($context + 1))

That's handy, I'll use it to show the source file context for the
first error/warning :-)

Example:

drivers/leds/led-triggers.c: In function ‘led_trigger_event’:
drivers/leds/led-triggers.c:227:3: error: implicit declaration of function ‘led_set_brightness’ [-Werror=implicit-function-declaration]

drivers/leds/led-triggers.c:227:
   224                  struct led_classdev *led_cdev;
   225
   226                  led_cdev = list_entry(entry, struct led_classdev, trig_list);
 > 227                  led_set_brightness(led_cdev, brightness);
   228          }                                                
   229          read_unlock(&trigger->leddev_list_lock);
   230  }

Thanks!
Fengguang
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