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Re: Why does $$parms show value as "?"

From: fche at redhat dot com (Frank Ch. Eigler)
To: Grant Edwards <grant dot b dot edwards at gmail dot com>
Cc: systemtap at sources dot redhat dot com
Date: Fri, 26 Aug 2011 11:05:28 -0400
Subject: Re: Why does $$parms show value as "?"
References: <j35vvd$h7r$1@dough.gmane.org> <4E5686BB.2020500@redhat.com> <j3615j$q6o$1@dough.gmane.org>

grant.b.edwards wrote:

> [...]
>> and that should keep all variables around for your
>> perusal.  Or it may be enough just to mark that function noinline.
>
> Declaring the function with the "noinline" keyword fixed the problem,
> but turning down optimization is probably going to be needed as well
> for other probes.

See also http://sourceware.org/systemtap/wiki/TipContextVariables
and https://bugzilla.redhat.com/show_bug.cgi?id=677681

- FChE

Follow-Ups:
- Re: Why does $$parms show value as "?"
  - From: Grant Edwards

References:
- Why does $$parms show value as "?"
  - From: Grant Edwards
- Re: Why does $$parms show value as "?"
  - From: Josh Stone
- Re: Why does $$parms show value as "?"
  - From: Grant Edwards

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