Re: ddb(4) spoils kernel stack in CURRENT?


Hello!

On Tue, 19 Dec 2006, Dmitry Pryanishnikov wrote:
I've tried to repeat this under the RELENG_6 as of 30-Oct (just removing
kernel options COMPAT_43TTY, COMPAT_FREEBSD6, INVARIANTS, INVARIANT_SUPPORT,
and using 'debug.kdb.enter' instead of 'debug.kdb.panic') - and kgdb unwinds
the stack even if the dump got via typing 'panic' from ddb:

Today I've tried this with the fresh (20-Dec) RELENG_6 and with INVARIANTS*
(so the only difference between kernel configs are CURRENT-only options
COMPAT_43TTY and COMPAT_FREEBSD6). No differences - kgdb successfully
unwinds the stack under RELENG_6. It seems that the following stands:

So it looks like a regression in CURRENT vs RELENG_6 (either ddb 'spoils' the stack somehow, or kgdb fails to unwind it).

Sincerely, Dmitry
--
Atlantis ISP, System Administrator
e-mail: dmitry@xxxxxxxxxxxxxx
nic-hdl: LYNX-RIPE
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