[dtrace-discuss] Putting Wish List items on the DTrace wiki?

[Vladimir Marek]

> [ I posted this a week ago, but haven't seen any response.
> 
>   Now that the DTrace "movers and shakers" are done setting
>   up dtrace.conf(8) (and a fine unconference it was!), can
>   someone give me some direction in setting up some pages?
> 
>   Who knows, maybe others will follow my lead and post their
>   own "wish list" items... -r ]

I posted reply, but don't recall seeing it here. My wishlist:

6496550 DTrace needs a way to get time linear sequential output on multi-cpu systems.
 - if you have more than one cpu core, dtrace output is just a mess. You
   have to trace(timestamp) in every probe and later sort the output by
   cat output | sed -e 's/^ *[^ ]* *[^ ]* *//' | sort -n +1 > sorted

6314638 Dtrace needs a packet dumper
 - if you ever tried to dump mblk_t structures in streams module, you
   know what I'm talking about

5059507 watchpoint provider
 - That would be nice, but falls a bit out of dtrace scope, as the
   probes would have to be generated during dtrace run. But how sweet
   would be this?

  pid$target::malloc:entry
  /self->is_inside_my_function/
  {
        self->x = 1;
  }

  pid$target::malloc:return
  /self->is_inside_my_function && self->x/
  {
        add_watchpoint("my_memory", arg0, 10)
  }

  watchpoint:my_memory:write:entry
  {
        printf("Culprit ! Memory %p is being changed\n", arg0);
        printf("Previous value = %c", stringof(copyin(arg0, 1)));
        ustack();
  }

  watchpoint:my_memory:write:return
  {
        printf("new value = %c", stringof(copyin(arg0, 1)));
  }

Thanks

-- 
	Vlad
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