Unknown symbol error using stap in RHEL 5.4

[Josh Stone]

On 05/12/2010 03:48 PM, Maynard Johnson wrote:
> This looked suspiciously like the problem reported in
> https://bugzilla.redhat.com/show_bug.cgi?id=499677.  But I tried
> 'rmmod uprobes', "make -C /usr/share/systemtap/runtime/uprobes
> clean", and "rm -rf ~/.systemtap", but was not able to clear the
> problem.  I noted that the systemtap level was 1.1-3, which is
> different from a fresh RHEL 5.4 install.  So I tried uninstalling
> systemtap and installing the 0.9.7-5 rpm from the install DVD, but
> that didn't clear the error either.  As a sanity check, I did a fresh
> install of RHEL 5.4 on another system, and was able to use stapitrace
> with no problem there.
> 
> Any thoughts on what might be causing this problem?

Can you search the filesystem to make sure there's not any other version
of uprobes hanging around somewhere?

>> If the above is your problem, then I think the best recourse is to
>> rebuild the kernel without uprobes, so that SystemTap's version will get
>> used.
> Jim, thanks for your reply, but this is not really an option for users.

What Jim describes would only be the case if the user was already
compiling a custom kernel with uprobes in it.  The RHEL 5.4 kernel does
not have uprobes itself.

What is the kernel version on the problem system?


Josh