[Interest] TSAN findings in a simple QApplication/QMetaObject::invokeMethod example
thiago.macieira at intel.com
Sat Nov 5 03:07:57 CET 2022
On Friday, 4 November 2022 00:27:27 PDT Dennis Luehring wrote:
> side question: TSAN seems not that relevant for Qt-user testing - nearly
> no blogs, tutorials on the internet, why is that? does TSAN not work
> very good with Qt?
It does not, unless you build Qt itself, and few people do that.
> i've have build Qt 6.4 from source with TSAN under Ubuntu 22.04
> it didn't really changed my TSAN Warnings (the example prints
> QT_VERSION_STR: 6.4.0)
The vast majority of those findings appear to come from Glib. Most likely, TSan
is unable to make heads or tails of what's going on. Fortunately, for that
one, you can simply do an
and have Qt use its own event loop, which should improve the results.
There are also some traces that stop inside libdbus. You may need to build
that one too with TSan. Either way, it's impossible to take any action when it
prints only 1 or 2 frames of the trace. I expect at least 10 frames to provide
Thiago Macieira - thiago.macieira (AT) intel.com
Cloud Software Architect - Intel DCAI Cloud Engineering
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