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To: "Paddie O'Brien" <paddieobrien@gmail.com>
Cc: David Smith <dsmith@redhat.com>, systemtap@sourceware.org
Subject: Re: Page faults
References: <CAOK12DZSCVBTZsi8iMAgjpJCU+8q-DWoK0KBUsuj0XUAz17azA@mail.gmail.com>	<522E36EF.3080904@redhat.com>	<CAOK12DbaDN6kY6Ng-V9oGcPAzoh7eDoDSZ6gz+wkKkUZO=kHsA@mail.gmail.com>
From: fche@redhat.com (Frank Ch. Eigler)
Date: Tue, 10 Sep 2013 20:12:00 -0000
In-Reply-To: <CAOK12DbaDN6kY6Ng-V9oGcPAzoh7eDoDSZ6gz+wkKkUZO=kHsA@mail.gmail.com> (Paddie O'Brien's message of "Tue, 10 Sep 2013 17:14:08 +0100")
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paddieobrien wrote:

> The script sometimes crashes unless I include --skip-badvars.
> Could my problem be caused by a misconfigured systemtap installation?

The exact error message could help.  It's possible that there is a
build problem (e.g., debuginfo errors), or runtime bugs, or kernel
unexpected behavior.  You may be able to use constructs such as

           try {
               foo = $var->field
           } catch { 
               next
           }

or "stap --suppress-handler-errors".

- FChE