K 10
svn:author
V 3
mdf
K 8
svn:date
V 27
2011-03-25T18:16:49.909763Z
K 7
svn:log
V 633
MFC r218825.  [The implementation change to kdb_sysctl_available()
cannot be MFC'd as it requires a non-MFCable change (adding drains to
sbuf)].

Modify kdb_trap() so that it re-calls the dbbe_trap function as long as
the debugger back-end has changed.  This means that switching from ddb
to gdb no longer requires a "step" which can be dangerous on an
already-crashed kernel.

Also add a capability to get from the gdb back-end back to ddb, by
typing ^C in the console window.

While here, simplify kdb_sysctl_available() by using
sbuf_new_for_sysctl(), and use strlcpy() instead of strncpy() since the
strlcpy semantic is desired.

END