Hi -
On Thu, Oct 25, 2007 at 03:17:22PM -0400, Mathieu Desnoyers wrote:
> [...]
> Since gcc is required to build the systemtap probes on the development
> marchine, I don't see why it would be much harder to also require prople
> to install drawf ? Or maybe the "crash" tool ?
The crash tool requires the dwarf data to work. The dwarf data for an
entire kernel (including all the modules) is on the order of hundreds
of megabytes. The symbol & marker list would be one thousandth the
size. You can see the deployment attractiveness of the latter.
> I guess you must already need to extract the symbols for your kprobes.
> Do you use kallsyms for this?
Nope. /proc/kallsyms is a another run-time-only source of data, and
so is not applicable for off-line (ahead-of-time) mapping.
> I would rather prefer not to implement superfluous built-time data
> extraction in the kernel build system just to make userspace
> simpler. [...]
It is not superfluous, as it would solve a real distribution problem.
- FChE
-
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