Two more data points:
1. it works for me on power8/le (po) with elfutils-0.167, building and
running the same way that it failed on power7.
2. it fails for me on power7 with elfutils-0.158.
So, it looks like a bug specific to big-endian powerpc and not related
to elfutils version. And it looks like the problem is how Symtab
interacts with elfutils, but only on big-endian.
I think you'll need to try it on big-endian power7. I remember we
talked about getting you an account on our power7 machine (biou), but
we didn't follow through on that. Is that right?
It also fails on Blue Gene front end. So, you could try it on one of
the vulcan login nodes. That's where I first noticed the problem, on
vesta at ANL.
--Mark
On 11/30/16 17:12, Bill Williams wrote:
Interesting. With the system libelf on po (looks to be 0.158, ppc-little endian) everything is fine. And with x86_64 elfutils 0.161 is fine (my RHEL6 system). 0.163 is fine on Xiaozhu's RHEL7 system (also x86_64). I'm using your compare unit test, Mark, so we're hitting Symtab::openFile and doing real work besides; I'm seeing reasonable symbols coming out, too.
Do you have any of these versions handy to cross-check against? (I mean, I'm sure you do on po, but that's not the most useful of reproducers if it's an elfutils version issue.)
--bw
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