Phil, Will,
I took another look at your problem. There was indeed a serious
bug in libpfm.
In fact two bugs:
- the way we sized pfmlib_regmask_t was bogus (ended up being 4 bytes
instead of 40)
- the kernel pmcs bitmask is bigger than that of libpfm causing buffer
overruns in
detect_unavail_pmcs()
I think the second bug explained the corruption you were seing.
I have updated CVS, just pull from it and the problem should go away.
As I anticipated, there were no compiler issues.
--
-Stephane
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