Re: Follow-up to [Bug translator/14596] New: probe module enhancement request

["Frank Ch. Eigler" <fche at redhat dot com>]

Hi -

> > What does % strace stap .... 2>&1 | grep -i drm.ko    say?

> Nothing.  I dumped the strace output into a file and searched over
> it, and there are no occurrences of "drm.ko".  Note that drm.ko is
> not a particular problem; that module was picked at random.  There
> is no module that works.

OK.  Does the strace give a hint at where stap *is* looking for the
modules?  There should be a bunch of stat / openat / getdents type
syscalls.


> FChE continues:
> What about   % stap .... -L 'module("*").function("*")' ?

> I can't figure out how to invoke a command with nested quotes,
> either from CLI or from a script:

You could just run it directly as I typed it.

% stap <<<YOUR OTHER -r/-a/-B/etc. OPTIONS HERE>>> -L 'module("*").function("*")'

>    [achaiken@sb-ubuntu-1204-64bit systemtap]$ stap --version
>    Systemtap translator/driver (version 1.6/0.152 non-git sources)

(You may be able to build or get hold of a newer version; 
that's two years old.)


> Presumably the most likely problem of the overall compilation
> failure is that stap doesn't know the path to search for the
> compiled kernel modules [...]

You're right.  The question is how to trick that old version into
doing what you need.


- FChE