------- Additional Comments From fche at redhat dot com 2008-11-05 20:20 -------
The interplay with $SYSTEMTAP_DEBUGINFO_PATH needs attention.
A recent change allowed that environment variable to point to a
kernel build tree path, but that's not quite right either, as
we need a real search path to allow user-space debuginfo etc.
Plus we need the kernel version value too, for passing
to tapset predicates, so we can't just replace the -r VERSION
with -r PATH, unless VERSION can be easily pulled out of the
build tree. (All mentions of /lib/modules/... in the code
would need to be audited/parametrized.)
The kernel build tree path is special in that we need to refer
to it not just to fetch debuginfo/markers/etc., but also to hook up
buildrun.cxx's (kernel-devel) paths to it. So I think we need a
separate option or environment variable:
% stap -B KERNEL_BUILD_TREE [...]
where `-r VERSION' would automatically computed if able, and
$SYSTEMTAP_DEBUGINFO_PATH goes back to being a plain
colon-separated search path of (sub)directories.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|systemtap at sources dot |rarora at redhat dot com
|redhat dot com |
Status|NEW |ASSIGNED
Summary|support "stap -r KERNEL- |support stap against plain
|BUILD-TREE" |KERNEL-BUILD-TREE
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