[FFADO-devel] Segfault on jackd/ffado shutdown?

[Jonathan W. <jw...@ju...>]

Hi everyone

In the last week or so I upgraded my development machine (to Slackware 14.0)
and this brought with it a newer compiler: gcc 4.7.1 (compared with 4.5.2 I
had previously).  I'm now getting segfaults when jackd/ffado shuts down
whereas earlier shutdowns were always clean.  The culprit seems to be
_Unwind_Resume, which is called at the end of
SystemTimeSource::SleepUsecRelative() when the nanosleep() is aborted with a
pthread_cancel() in the main thread.

I'm getting this for MOTU and RME interfaces so I don't think it's driver
specific.

All c++ components used by ffado (libxml++, glibmm, libconfig++ etc) have
been compiled by gcc 4.7.1 so I don't think this is an obscure gcc/c++
version mismatch thing.  The use of pthread_cancel() and pthread_join() in
this context looks sound to me so I'm not entirely sure what could be going
wrong.  Perhaps there's another subtle memory corruption bug.

Before I dig into this, has anyone else noticed similar behaviour with
recent gcc versions?

Regards
  jonathan