systemtap support with USTD1 only (Was: [PATCH 0 of 2] Add systemtap tapset tests)

Jon VanAlten jon.vanalten at
Tue Mar 27 15:28:39 PDT 2012

----- Original Message -----
> From: "Mark Wielaard" <mjw at>
> To: "Jon VanAlten" <jon.vanalten at>
> Cc: "IcedTea" <distro-pkg-dev at>, "Andrew Hughes" <ahughes at>
> Sent: Tuesday, March 27, 2012 8:11:18 AM
> Subject: systemtap support with USTD1 only (Was: [PATCH 0 of 2] Add systemtap tapset tests)
> Hi,
> On Mon, 2012-03-26 at 22:22 +0200, Mark Wielaard wrote:
> > I am happy the tests showed the hotspot update didn't break
> > anything.
> > Next up is tweaking Andrew's introduction of USTD3 and try to just
> > do the same thing as Solaris (aka USDT1, Apple uses USDT2 but
> > systemtap
> > should just support the SDTV1 source level). Then lets see if we
> > can
> > just get any changes left directly into hotspot instead of carrying
> > them as a patch in the tree.
> And that is the attached patch. I got rid of USDT3 and just made
> GNU/Linux with systemtap USTD1 like Solaris with macros instead of
> functions for all DTRACE probes. All new tests PASS with this.
> I think everything still left in systemtap.patch can be pushed into
> hotspot directly since the diff is actually pretty small. After this
> gets in icedtea7 HEAD I'll propose it there next.
> Cheers,
> Mark

Sounds cool, but I am grossly unqualified to decide if this is likely
to cause any issues.  Hopefully Andrew will have more to say :)

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