Hi all! 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: https://github.com/lttng/lttng-ust/tree/master/doc/examples/hello-static-lib 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.)
Any hints where I could start investigating the issue are welcome. Regards, Moritz ~ # pwd /root ~ # lttng create Spawning a session daemon Session auto-20200720-174509 created. Traces will be written in /root/lttng-traces/auto-20200720-174509 ~ # lttng enable-event -au All UST events are enabled in channel channel0 ~ # lttng start Tracing started for session auto-20200720-174509 ~ # ./hello Hello, World! Tracing... done. ~ # lttng destroy Session auto-20200720-174509 destroyed ~ # ll total 40 -rwxr-xr-x 1 root root 39280 Jul 20 17:44 hello* Moritz Pflanzer Software Development Engineer [cid:image001.png@01D3BF6E.185110B0] Räffelstrasse 28 8045 Zürich E: moritz.pflan...@hexagon.com<mailto:moritz.pflan...@hexagon.com><mailto:carolin.sieb...@hexagon.com> W: http://www.hexagongeosystems.com
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