Re: Enabling dwarf unwinder for ppc64

[Mark Wielaard <mjw@redhat.com>]

On Fri, 2011-10-21 at 15:34 +0200, Mark Wielaard wrote:
> Host: Linux ibm-ps701-01-lp2.rhts.eng.bos.redhat.com
> 2.6.32-209.el6.ppc64 #1 SMP Wed Oct 12 03:52:18 EDT 2011 ppc64 ppc64
> ppc64 GNU/Linux
> Snapshot: version 1.7/0.152 commit release-1.6-340-gb100897
> GCC: 4.4.6 [gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)]
> Distro: Red Hat Enterprise Linux Server release 6.2 Beta (Santiago)
> 
> # of expected passes            2893
> # of unexpected failures        127
> # of unexpected successes       9
> # of expected failures          255
> # of untested testcases         65
> # of unsupported tests          6
> 
> About 100 of the unexpected failures are in the systemtap.unprivileged
> testsuite, which I haven't investigated yet.

While investigating, I found the following in
testsuite/systemtap.unprivileged/unprivileged_myproc.exp

# ppc64 needs a more restrictive constraint for the probe args
if {[regexp "^(x86_64|i.86)$" $::tcl_platform(machine)] == 0} {
set exeflags "$exeflags additional_flags=-DSTAP_SDT_ARG_CONSTRAINT=nr"
}

But (removing) that doesn't seem to change any of the results it seems.
What is that used for?

Thanks,

Mark