[Interest] Will TSAN_OPTIONS=detect_deadlocks=1 work when Qt is compiled with -sanitize thread?

[Nuno Santos]

Hi,

Thanks for your reply.

I’ve compiled Qt with -sanitize thread and I’m trying to find deadlock on my application.

Regards,

Nuno

> On 18 Jul 2024, at 16:15, Dennis Luehring via Interest <interest at qt-project.org> wrote:
> 
> Am 18.07.2024 um 17:07 schrieb Nuno Santos via Interest:
>> https://github.com/google/sanitizers/wiki/ThreadSanitizerDeadlockDetector
>> 
>> "Just use TSAN_OPTIONS=detect_deadlocks=1 when running your tsan-instrumented program.”
>> 
> 
> this document is from 2015 - lock order inversion aka Deadlock detection
> is a feature that is active per default
> or better said i've used TSAN many times to find deadlocks - maybe its a
> special feature but seems to be the default now
> 
> beware: you should always use recent gcc or clang for TSAN/ASAN as they
> evolve permanently - older compiler instrumentation just don't be that good
> in detecting - im normaly using SUSE Tumbleweed with latest available
> gcc/clang for a my "bug hunting" environment
> 
> do you try to find a Deadlock inside Qt code or inside your application
> - for the first a TSAN build of Qt would be better to prevent false
> positives
> 
> 
> 
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