Re: Function tracing not working

David Aldrich via lttng-dev <[email protected]> Wed, 4 Jun 2025 17:22:35 +0100
Newsgroups org.lttng.lists.lttng-dev
Message-ID <CAJK_ieiG5yDoyg8TetipUJZNMhrpteZuY5CBv5eeUNE18AJq9Q@mail.gmail.com>
Hi Mathieu

> > Any idea what I am doing wrong please?
>
> AFAIK, the "LD_PRELOAD" environment variable is cleared by
> sudo when running its child process for security purposes.

Thanks for your answer, that does help. However, I have now adjusted
the code so that sudo is not required, but when I import the trace the
UST-CallStacks are still strikethrough.

Any thoughts why this is happening?

I don't see any runtime errors whether or not I specify the prefix:

LD_PRELOAD=liblttng-ust-cyg-profile.so

Is that expected?

Best regards, David