[ardour-dev] Ardour segfault - backtrace info

[Mark Knecht]

This is from a session that was done some time ago. It works fine
unless I use the loop play mode in which it segfaults. The segfault
happens the second time I hit the loop play button or when the session
actually loops back to 0:

(Mantis #1120)

mark at lightning ~ $ gdb ardour
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This GDB was configured as "x86_64-pc-linux-gnu"...Using host
libthread_db libra ry "/lib/libthread_db.so.1".

(gdb) run
Starting program: /usr/bin/ardour
[Thread debugging using libthread_db enabled]
[New Thread 46912529263712 (LWP 9592)]
[New Thread 1082132832 (LWP 9595)]
Ardour/GTK 0.9beta30
   (built using 0.603.2 with libardour 0.900.3 and GCC version 3.4.4
(Gentoo 3.4 .4-r1, ssp-3.4.4-1.0, pie-8.7.8))
Copyright (C) 1999-2005 Paul Davis
Some portions Copyright (C) Steve Harris, Ari Johnson, Brett Viren, Joel Baker

Ardour comes with ABSOLUTELY NO WARRANTY
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This is free software, and you are welcome to redistribute it
under certain conditions; see the source for copying conditions.
Loading UI configuration file /etc/ardour/ardour_ui.rc
Loading system configuration file /etc/ardour/ardour_system.rc
Loading user configuration file /home/mark/.ardour/ardour.rc
ardour: [INFO]: No H/W specific optimizations in use
ardour: [WARNING]: Your system generates "Mod2" when the NumLock key
is pressed.  This can cause problems when editing so Ardour will use
Mod3 to mean Meta rathe r than Mod2

Gdk-WARNING **: Missing charsets in FontSet creation


Gdk-WARNING **:     ISO8859-1

[New Thread 1090525536 (LWP 9596)]

Gdk-WARNING **: Missing charsets in FontSet creation


Gdk-WARNING **:     ISO8859-1

[New Thread 1098918240 (LWP 9597)]
Loading session /home/mark/Audio/audio2/Ardour/Red-Sun using snapshot Red-Sun
[New Thread 1107310944 (LWP 9598)]
[New Thread 1115703648 (LWP 9599)]
[New Thread 1124096352 (LWP 9600)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1098918240 (LWP 9597)]
0x00000000007ad1c4 in ARDOUR::Route::process_output_buffers (this=0x193ba60,
    bufs=@0x177dee0, nbufs=1, start_frame=0, end_frame=0, nframes=0,
    offset=64, with_redirects=true, declick=0, meter=false) at route.cc:432
432                                     _effective_gain = gab[nframes-1];
(gdb) bt
#0  0x00000000007ad1c4 in ARDOUR::Route::process_output_buffers (
    this=0x193ba60, bufs=@0x177dee0, nbufs=1, start_frame=0, end_frame=0,
    nframes=0, offset=64, with_redirects=true, declick=0, meter=false)
    at route.cc:432
#1  0x0000000000703f79 in ARDOUR::AudioTrack::passthru_silence (
    this=0x193ba60, start_frame=0, end_frame=0, nframes=0, offset=64,
    declick=0, meter=false) at audio_track.cc:477
#2  0x0000000000704026 in ARDOUR::AudioTrack::no_roll (this=0x193ba60,
    nframes=0, start_frame=0, end_frame=0, offset=64,
    session_state_changing=true, can_record=false, rec_monitors_input=false)
    at audio_track.cc:497
#3  0x00000000007ef067 in ARDOUR::Session::no_roll (this=0x177dc00, nframes=0,
    offset=64) at session_process.cc:103
#4  0x00000000007efc3c in ARDOUR::Session::process_with_events (
    this=0x177dc00, nframes=0) at session_process.cc:387
#5  0x00000000007eee30 in ARDOUR::Session::process (this=0x177dc00, nframes=64)
    at session_process.cc:62
#6  0x0000000000709c39 in ARDOUR::AudioEngine::process_callback (
    this=0xddfc80, nframes=64) at audioengine.cc:315
#7  0x000000000070974d in ARDOUR::AudioEngine::_process_callback (nframes=64,
    arg=0xddfc80) at audioengine.cc:210
#8  0x00002aaaac30e905 in jack_client_thread (arg=0x41800d08) at client.c:1426
#9  0x00002aaaabd110fa in start_thread () from /lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---