Issues with probing multiple modules in script

["Klein, Matt" <mklein at amazon dot com>]

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