From: "Klein, Matt" <mklein@amazon.com>
To: "systemtap@sourceware.org" <systemtap@sourceware.org>
Subject: Issues with probing multiple modules in script
Date: Wed, 28 Dec 2011 08:07:00 -0000 [thread overview]
Message-ID: <FCDCC4AE6C28B44B90993D9894683575B35B07D5@EX-SEA3-A.ant.amazon.com> (raw)
Hi,
I'm having some strange issues trying to probe multiple modules in the same script. For starters:
[~/AmazonData/Source/stap]$ stap -V
SystemTap translator/driver (version 1.3/0.152 non-git sources)
If I try to probe a single module, everything works as expected. However if I probe multiple modules, it seems like probes in the first module found works fine, but any probes on subsequent modules don't actually work. I also see the following error for all modules other than the first:
WARNING: missing unwind/symbol data for module ...
Here is how I am invoking stap:
stap -p4 -m test -r /home/mklein/AmazonData/Source/linux test.stp
I have looked through the -vvvvv output, and it looks to me like all of the module probe points are being identified correctly, but then I see the WARNING message and it doesn't look like the probes ever actually get invoked.
I know that that the other module probes are correct, because if I probe them in isolation, everything works as expected.
Is there anything obvious I am doing wrong (like probing multiple modules from the same script doesn't work)? If not, what data can I provide to help get to the bottom of this?
Thanks,
Matt
--
Matt Klein
Senior Software Engineer
Amazon Web Services
mklein@amazon.com / 206-266-3347
next reply other threads:[~2011-12-27 22:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-28 8:07 Klein, Matt [this message]
2011-12-31 1:33 ` Frank Ch. Eigler
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