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Hi all!</div>
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I'm struggling to get userspace tracing working on an aarch64 platform (busybox on top of Linux 5.4.24 kernel). I followed the guidelines in the docs and am currently using this example program for testing:
<a href="https://github.com/lttng/lttng-ust/tree/master/doc/examples/hello-static-lib" id="LPlnk712650">
https://github.com/lttng/lttng-ust/tree/master/doc/examples/hello-static-lib</a><br>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I cross-compiled lttng-ust and that example, but when I run the following commands on the platform no traces are recorded. If I use the same example on my x86 machine everything works as expected. (And kernelspace tracing is working on that aarch64 system.)<br>
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Any hints where I could start investigating the issue are welcome.<br>
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Regards,</div>
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Moritz<br>
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<div>~ # pwd</div>
<div>/root</div>
~ # lttng create
<div>Spawning a session daemon</div>
<div>Session auto-20200720-174509 created.</div>
<div>Traces will be written in /root/lttng-traces/auto-20200720-174509</div>
<div>~ # lttng enable-event -au</div>
<div>All UST events are enabled in channel channel0</div>
<div>~ # lttng start</div>
<div>Tracing started for session auto-20200720-174509</div>
<div>~ # ./hello </div>
<div>Hello, World!</div>
<div>Tracing... done.</div>
<div>~ # lttng destroy</div>
<div>Session auto-20200720-174509 destroyed</div>
<div>~ # ll</div>
<div>total 40</div>
<div>-rwxr-xr-x 1 root root 39280 Jul 20 17:44 hello*</div>
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<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray">Moritz Pflanzer</span></b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray"><br>
Software Development Engineer<br>
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</span></u><span style=""><img class="EmojiInsert" id="OWAPstImg328303" alt="cid:image001.png@01D3BF6E.185110B0" style="width:2.0833in; height:0.6458in" width="200" height="62" data-outlook-trace="F:1|T:1" src="cid:6f38b333-ccc0-4343-bf38-1e4c24868a24"></span><u><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(0,130,191)"></span></u></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray"><br>
Räffelstrasse 28</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0; margin-bottom:0"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray">8045 Zürich<b><br>
</b><b>E: </b><a href="mailto:moritz.pflanzer@hexagon.com" class="OWAAutoLink"><span style="color:rgb(0,111,201)">moritz.pflanzer@hexagon.com</span></a><b></b></span><span style=""><a href="mailto:carolin.siebert@hexagon.com" target="_blank" rel="noopener noreferrer"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(5,99,193)"></span></a></span><b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray"><br>
W: </span></b><span style=""><a href="http://www.hexagongeosystems.com" target="_blank" rel="noopener noreferrer"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(5,99,193)">http://www.hexagongeosystems.com</span></a></span><br>
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