Hi Evan,
It turns out it's a Babeltrace 2 bug. Here the fix:
https://review.lttng.org/c/babeltrace/+/6257.
It should be merged into the master and stable-2.0 branches soon.
Thank you for reporting the issue,
Francis
On 8/4/21 3:55 AM, Evan Galea wrote:
Hi Francis, thanks for your reply. As it turns out, running babeltrace
on the file worked and I'm able to read the traces. I am running
babeltrace 1.5.8, lttng 2.12.4, lttng-tools 2.12.x stable, and lttng
modules 5.8.0-63. I attached the trace of the file.
On Mon, Aug 2, 2021 at 8:56 AM Francis Deslauriers
<francis.deslauri...@efficios.com
<mailto:francis.deslauri...@efficios.com>> wrote:
Hi Evan,
On 8/1/21 5:11 AM, Evan Galea via lttng-dev wrote:
Hi there
Thanks for help on my previous issue. I was able to get
callstack-user to work and see it in my traces. However, in order
to get it to run I needed to enable-event --kernel all. Is it
necessary to have all kernel events enabled to run
callstack-user? Or is it just one specific event?
When I try to run it without enabling all kernel events the
command is accepted and it runs but I get the following error
when trying to view my traces:
(╯°□°)╯︵ ┻━┻ ctf-meta-update-value-storing-indexes.c:65:
update_field_class_stored_value_index(): Assertion `tgt_fc` failed.
Aborted (core dumped)
What does this error mean? Should I just continue to enable all
kernel events?
It's a Babeltrace 2 error. Now, we need to find out if the root
cause is the LTTng kernel tracer or Babeltrace2 itself.
What is the "one specific event" you're enabling that seems to
cause this issue?
Do you have access to a Babeltrace 1.5 build? if so, could you try
to read that same trace using it?
Could you please share a small trace reproducing this issue?
What version of LTTng-tools, LTTng-Modules, and Babeltrace2 are
you using?
Cheers,
Francis
My current command setup, not sure if relevant
lttng create &&
lttng enable-channel mychannel --subbuf-size 100000000
lttng enable-event --kernel --all &&
lttng add-context -u -t vpid -t vtid -t procname &&
lttng add-context --kernel --type callstack-user &&
lttng add-context --kernel --type callstack-kernel &&
lttng enable-event --jul jello
again thank you for your time
Evan Galea
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