On Friday, September 15, 2006 10:47 AM, Frank Ch. Eigler wrote:
Hi -
On Fri, Sep 15, 2006 at 11:16:09AM -0700, David Wilder wrote:
[...]
jprobe_return is black-listed but it is not helping.. [...]
[...]
Humm ok. I am seeing the problem in semok/twenty.stp run by make all
check. The test is "probe kernel.function("*") {}", Is there a way
to use "*"
and exclude a function?
The problem here is that while some of these routines are blacklisted
in the kernel (kprobe_register will fail), they are not blacklisted in
the translator. We need to teach the translator to look for the
kernel-side blacklist info too (the .kprobes section naming methinks),
and treat it similarly to the .init/.exit special cases already
present in tapsets.cxx.
This way, function("*") will quietly exclude the blacklisted
functions.
- FChE
Indeed this would be nice -- see bug #2639.
http://sources.redhat.com/bugzilla/show_bug.cgi?id=2639
In the mean time, we can add additional functions to the static
blacklist in the translator. See dwarf_query::build_blacklist(). It's
unfortunate that we have to try to maintain this, but I suppose it's
better than nothing. And, as you mention, kprobe_register will block
these too, so this is really just a matter of *when* the error is
caught.
Josh