From: David Smith <dsmith@redhat.com>
To: Maynard Johnson <maynardj@us.ibm.com>
Cc: systemtap@sourceware.org, "Frank Ch. Eigler" <fche@redhat.com>
Subject: Re: Backward compatibility for insn probe point
Date: Mon, 27 Apr 2009 21:01:00 -0000 [thread overview]
Message-ID: <49F61D09.8090503@redhat.com> (raw)
In-Reply-To: <49D3E3DF.1000108@us.ibm.com>
Maynard Johnson wrote:
> Frank has already made the changes in runtime/itrace.c to support
> backward compatibility with older utrace.
> I wanted to test the insn probe point on an older utrace, so I built
> and installed systemtap 0.9.5 on a ppc970 blade running RHEL 5.3. I
> ran the following simple test:
>
> # stap -c /bin/ls simple-test.stp /bin/ls -o simple-out -k -vvv
> where simple-test.stp is . . .
> =========simple-test.stp ========================
> global instrs = 0
>
> probe begin {
> printf("systemtap starting probe\n")
> }
>
> probe process(@1).insn {
> instrs += 1
> }
>
> probe end { printf("systemtap ending probe\n")
> printf("itraced = %d\n", instrs)
> }
> ==================================
>
> The result of the above test is that the stap command hangs at
> "stapio:start_cmd:195 execing target_cmd /bin/ls". If I Ctl-C the
> job, it finished (i.e, I see "Pass 5: run completed ..."), but the
> output file contents indicate the insn probe was not hit (i.e.,
> "itraced = 0").
>
> Any suggestions on where to look for the problem?
I took a look at this and fixed it. For more details, see
<http://sources.redhat.com/bugzilla/show_bug.cgi?id=10091>.
--
David Smith
dsmith@redhat.com
Red Hat
http://www.redhat.com
256.217.0141 (direct)
256.837.0057 (fax)
next prev parent reply other threads:[~2009-04-27 21:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-01 21:59 Maynard Johnson
2009-04-27 21:01 ` David Smith [this message]
2009-04-29 13:56 ` Maynard Johnson
2009-04-29 21:08 ` Maynard Johnson
2009-04-30 18:00 ` David Smith
2009-04-30 20:48 ` Roland McGrath
2009-05-12 16:06 ` David Smith
2009-05-12 18:20 ` Roland McGrath
2009-05-13 15:04 ` David Smith
2009-05-13 18:24 ` Roland McGrath
2009-05-14 15:11 ` David Smith
2009-05-14 18:41 ` Roland McGrath
2009-05-14 19:01 ` Maynard Johnson
2009-05-14 19:44 ` David Smith
2009-05-14 21:36 ` David Smith
2009-05-15 13:52 ` ia64 hang when using itrace (was Re: Backward compatibility for insn probe point) David Smith
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