Robin Gareus
634d325e5d
The backend holds `_port_callback_mutex` while disconnecting ports. In some cases disconnecting a port can drop the last reference resulting in a port-deletion from the connection handler. This in turn will eventually aquire the `_port_callback_mutex` and deadlock. This is now circumvented by using atomic operations instead of taking a lock to set the `_port_change_flag`. The flag is also used to trigger a latency update in some cases, atomic is preferable to taking a lock to set this flag. -- Full bt: https://paste.debian.net/1184056/ Short: #1 in pthread_mutex_lock () #2 in ARDOUR::PortEngineSharedImpl::port_connect_add_remove_callback() #3 in ARDOUR::BackendPort::~BackendPort() #4 in ARDOUR::DummyPort::~DummyPort() #6 in ARDOUR::DummyAudioPort::~DummyAudioPort() #7 in boost::checked_delete<ARDOUR::BackendPort>(ARDOUR::BackendPort*) #12 in boost::shared_ptr<ARDOUR::ProtoPort>::reset() #13 in ARDOUR::Port::drop() #14 in ARDOUR::Port::~Port() #15 in ARDOUR::AudioPort::~AudioPort() #17 in ARDOUR::AudioEngine::add_pending_port_deletion(ARDOUR::Port*) #20 in boost::detail::sp_counted_base::release() #37 in ARDOUR::PortManager::connect_callback() at libs/ardour/port_manager.cc:788 #38 in ARDOUR::DummyAudioBackend::main_process_thread() at libs/backends/dummy/dummy_audiobackend.cc:1018 |
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appleutility | ||
ardour | ||
ardouralsautil | ||
audiographer | ||
backends | ||
canvas | ||
clearlooks-newer | ||
evoral | ||
fluidsynth | ||
fst | ||
gtkmm2ext | ||
hidapi | ||
libltc | ||
lua | ||
midi++2 | ||
panners | ||
pbd | ||
plugins | ||
ptformat | ||
qm-dsp | ||
surfaces | ||
temporal | ||
vamp-plugins | ||
vamp-pyin | ||
vfork | ||
vst3 | ||
waveview | ||
widgets | ||
zita-convolver | ||
zita-resampler |