dtrace discuss - Mar 2007 - breakpoint(), ecb, and resumption of control.

I have a bug in my kernel that occurs under a specific set of circumstances
(last packet of an FTP of a particular file - I can''t just send a
singleton).  I''m using a FBT predicate with a breakpoint() to catch
this packet.

Now I drop into kmdb with an ecb.  I''d like to single-step through and
beyond the function in question.  The problem is, when I "::step out"
it''s like typing ":c" and I hit my bug.  And if I do
single-stepping, I get stuck in all sorts of DTrace code.  Finally, I
can''t enable a breakpoint... because DTrace is loaded!  :)

So how do I get kmdb to actually stop in the function whose function boundary I
intercepted?

Thanks,
Dan
 
 
This message posted from opensolaris.org

On 3/9/07, Dan McDonald <danmcd at sun.com> wrote:
> I have a bug in my kernel that occurs under a specific set of
> circumstances (last packet of an FTP of a particular file - I
> can''t just send a singleton).  I''m using a FBT predicate
with
> a breakpoint() to catch this packet.
kdi_dtrace_state/W1

should allow breakpoints to then be installed.  ::step out should (I
believe) then work.

Cheers,
- jonathan