copy faults from user_string* functions

[Frank Ch. Eigler]

Hi, Eric -


normalperson wrote:

> Hi all, just to clarify, not all of these faults are user errors, right?
> I get these sometimes with some strings (constants, I think):
> ERROR: user string copy fault -14 at 000000000042f16c near identifier 'user_string_n' at $prefix/share/systemtap/tapset/uconversions.stp:120:10
> [...]

It can simply mean having some not-yet-paged-in data, which in the
spirit of non-interference, stap will not trigger a page fault for.
Please try error-catching constructs such as try{}catch{}, or
--skip-badvars to tolerate them.


> This is for cmogstored, if anybody is interested in reproducing this,
> I've pushed my work-in-progress to the "st-wip-broken" branch of
> git://bogomips.org/cmogstored.git   The HACKING doc in the top-level
> should document all the build-dependencies if you want to try to
> reproduce it.

Neat.

- FChE