reentrant probes

Gromova, Victoria victoria.gromova@intel.com
Thu May 5 14:28:00 GMT 2005


Hi Frank,
Could it be possible & useful to defer probe handler execution to the
later point instead of just skipping it? 


Victoria

-----Original Message-----
From: systemtap-owner@sources.redhat.com
[mailto:systemtap-owner@sources.redhat.com] On Behalf Of Frank Ch.
Eigler
Sent: Thursday, May 05, 2005 6:06 PM
To: Prasanna S Panchamukhi
Cc: systemtap@sources.redhat.com
Subject: Re: reentrant probes

Hi -


On Thu, May 05, 2005 at 06:49:11PM +0530, Prasanna S Panchamukhi wrote:

> [...]  Another alternative approach to disarm the probes temporarily
> is to handle the new probe by single stepping without calling the
> registered user handlers. Please find the patch below. [...]

It would be desirable to flag the occurrence of such a skipped probe
somewhere, so that the user of that probe can tell that this has
happened.  This is important because, without such an indication, a
systemtap user would have no indication that her program executed
incompletely.


- FChE



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