Re: Forking EPICS processes

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 2/4/25 05:24, Grzegorz Kowalski via Tech-talk wrote:
> Hello,
>
> I'm working on a multiprocess application using EPICS.
> My main process only reads the configuration and spins up child processes where EPICS is actually used.
> However, when forking I get this warning:
>
> Warning: Undefined Behavior!
>           Detected use of epicsThread from child process after fork()
>
> Is there a way to avoid starting any epicsThreads in the main process and only do so in a child process that needs them?
To answer this, we would have to know more about your application.
Which of the Base libraries you are loading, and how.  What calls
are made...

If your code is linked as a single executable, I would suggest loading
that executable in GDB add setting a break point for epicsThreadInit()
to see how it is called.

for reference:

https://urldefense.us/v3/__https://github.com/epics-base/epics-base/issues/211__;!!G_uCfscf7eWS!bgAMhJAZ5CmlyLqDgEKwh4Qx7DDYbD_sG0F7J2uxlHJIvbJVbDD4dU4t-Oc9HgqpFZ10C66zKCweiBEs0DLH8R_aJQ$