Re: [tracecompass-dev] Question about working with Kernel callstacks

[Geneviève Bastien <gbastien@xxxxxxxxxxxx>]

Hi,

To add to Denis's answer, indeed, it is possible that you may get the symbols automatically if you also enable in your trace the `lttng_ust_statedump*` userspace events. If you don't have userspace tracing, you may add the traced application's binaries in the `Configure symbols` menu described in the links.

I don't remember if the symbols are relative to the binary or absolute or what and if all methods of configuring symbols work well, but apparently I did know at some point and wrote the doc [3]! If/when you get symbols, make sure they make sense though.

[3] http://archive.eclipse.org/tracecompass.incubator/doc/org.eclipse.tracecompass.incubator.kernel.doc.user/User-Guide.html

Geneviève

On 2021-07-27 6:10 a.m., Petrovic, Denis via tracecompass-dev wrote:

Hello,

 

Trace Compass does indeed offer a mechanism for translating addresses to symbol names, and it seems that this is what you’re looking for.

You can find a well-written tutorial with example traces and symbols here [1], and more information here [2].

 

I haven’t got much experience on the subject, so maybe it won’t be that easy in your particular use-case. Fingers crossed :)

 

[1]: https://github.com/tuxology/tracevizlab/blob/e5c5e04050820791f33f9449455a90579040485b/labs/201-lttng-userspace-tracing/README.md#task-3-understanding-the-symbols

[2]: http://archive.eclipse.org/tracecompass/doc/stable/org.eclipse.tracecompass.doc.user/LTTng-UST-Analyses.html

 

Denis.

 

From: tracecompass-dev <tracecompass-dev-bounces@xxxxxxxxxxx> On Behalf Of Evan Galea
Sent: mardi 27 juillet 2021 10:47
To: tracecompass-dev@xxxxxxxxxxx
Subject: [tracecompass-dev] Question about working with Kernel callstacks

 

Hello, and apologies if this is not the correct location to ask the question or if it's been answered before.

 

I am currently tracing the Linux kernel callstack, specifically the 'callstack user' parameter in LTTng's trace events as highlighted. I was wondering if there was a method of converting the values into method names. This may not be something that is specifically done in trace-compass but I was wondering if anyone has had experience with this here.

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