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<p>Hi Evan,</p>
<div class="moz-cite-prefix">On 8/1/21 5:11 AM, Evan Galea via
lttng-dev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAA+-46pQev9-S0_htpu7QT8cVF_Rv25deDjRQGMzgnzvRMG9VQ@mail.gmail.com">
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<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">Hi there</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
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<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">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?</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px"><br>
</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">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:</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px"><br>
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<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
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<div style="box-sizing:border-box"> (╯°□°)╯︵ ┻━┻
ctf-meta-update-value-storing-indexes.c:65:
update_field_class_stored_value_index(): Assertion `tgt_fc`
failed.<br>
Aborted (core dumped)</div>
<div style="box-sizing:border-box"><br>
</div>
<div style="box-sizing:border-box">What does this error mean?
Should I just continue to enable all kernel events?</div>
</div>
</div>
</blockquote>
<p>It's a Babeltrace 2 error. Now, we need to find out if the root
cause is the LTTng kernel tracer or Babeltrace2 itself.</p>
<p>What is the "one specific event" you're enabling that seems to
cause this issue?<br>
</p>
<p>Do you have access to a Babeltrace 1.5 build? if so, could you
try to read that same trace using it?</p>
<p>Could you please share a small trace reproducing this issue?</p>
<p>What version of LTTng-tools, LTTng-Modules, and Babeltrace2 are
you using?</p>
<p><br>
</p>
<p>Cheers,</p>
<p>Francis<br>
</p>
<blockquote type="cite"
cite="mid:CAA+-46pQev9-S0_htpu7QT8cVF_Rv25deDjRQGMzgnzvRMG9VQ@mail.gmail.com">
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<div style="box-sizing:border-box">My current command setup,
not sure if relevant</div>
</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px"><br>
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<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">lttng create
&&<br>
lttng enable-channel mychannel --subbuf-size 100000000<br>
lttng enable-event --kernel --all &&<br>
lttng add-context -u -t vpid -t vtid -t procname &&<br>
lttng add-context --kernel --type callstack-user &&<br>
lttng add-context --kernel --type callstack-kernel &&<br>
lttng enable-event --jul jello</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px"><br>
</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">again thank you for
your time</div>
<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px"><br>
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<div style="box-sizing:border-box;font-family:"Segoe
UI",system-ui,"Apple Color Emoji","Segoe
UI Emoji",sans-serif;font-size:14px">Evan Galea</div>
</div>
<br>
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