View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0007769 | ardour | bugs | public | 2019-06-22 11:24 | 2020-04-19 20:18 |
| Reporter | unfa | Assigned To | x42 | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | no change required | ||
| Platform | AMD 64 PC | OS | Manjaro Linux | OS Version | 18.0.4 Illyria |
| Product Version | 5.12 | ||||
| Summary | 0007769: Consistent crashes when playing a certain session | ||||
| Description | After recent Manjaro update I have Ardour freezing randomly during playback in a particular session. I tested other session and it's fine. I don't see a connection to any particular faulty plug-in though. I'm attaching the GDB backtrace and the session in question (I had to remove all audio interchange to reduce the upload size). | ||||
| Steps To Reproduce | 1. Open the attached session. 2. Start playback. 3. Wait for the crash. | ||||
| Additional Information | Thread 44 "ardour-5.12.0" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc45c6700 (LWP 7164)] 0x00007ffff7ca2c24 in ARDOUR::LV2Plugin::connect_and_run(ARDOUR::BufferSet&, long, long, double, ARDOUR::ChanMapping, ARDOUR::ChanMapping, unsigned int, long) () from /usr/lib/ardour5/libardour.so.3 (gdb) bt #0 0x00007ffff7ca2c24 in ARDOUR::LV2Plugin::connect_and_run(ARDOUR::BufferSet&, long, long, double, ARDOUR::ChanMapping, ARDOUR::ChanMapping, unsigned int, long) () at /usr/lib/ardour5/libardour.so.3 0000001 0x00007ffff7ae243c in ARDOUR::PluginInsert::connect_and_run(ARDOUR::BufferSet&, long, long, double, unsigned int, long, bool) () at /usr/lib/ardour5/libardour.so.3 #2 0x00007ffff7ae35f5 in ARDOUR::PluginInsert::automate_and_run(ARDOUR::BufferSet&, long, long, double, unsigned int) () at /usr/lib/ardour5/libardour.so.3 #3 0x00007ffff7ae370b in ARDOUR::PluginInsert::run(ARDOUR::BufferSet&, long, long, double, unsigned int, bool) () at /usr/lib/ardour5/libardour.so.3 0000004 0x00007ffff7b48b1e in ARDOUR::Route::process_output_buffers(ARDOUR::BufferSet&, long, long, unsigned int, int, bool) () at /usr/lib/ardour5/libardour.so.3 0000005 0x00007ffff7a758cc in ARDOUR::MidiTrack::roll(unsigned int, long, long, int, bool&) () at /usr/lib/ardour5/libardour.so.3 #6 0x00007ffff78a328f in ARDOUR::Graph::process_one_route(ARDOUR::Route*) () at /usr/lib/ardour5/libardour.so.3 #7 0x00007ffff78a2e07 in ARDOUR::Graph::run_one() () at /usr/lib/ardour5/libardour.so.3 0000008 0x00007ffff78a2f79 in ARDOUR::Graph::main_thread() () at /usr/lib/ardour5/libardour.so.3 0000009 0x00007fffec406f27 in ARDOUR::JACKAudioBackend::_start_process_thread(void*) () at /usr/lib/ardour5/backends/libjack_audiobackend.so 0000010 0x00007ffff56d7a92 in start_thread () at /usr/lib/libpthread.so.0 0000011 0x00007ffff501fcd3 in clone () at /usr/lib/libc.so.6 | ||||
| Tags | No tags attached. | ||||
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Update: it crashes 6.0-pre the same way. |
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Here's a more detailed backtrace: https://0bin.net/paste/H9NzmWTzHJ5H-ikh#rzGBioXzPQ-2R6vWrJX+adCVXLI9BpR05g3CgvbBzhl |
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The crash is in a LV2 plugin. Load the session with "Safe Mode: disable all plugins". As is, this backtracke of optimized builds doesn't provide a clue to he cause of the issue. A debug version of Ardour and the plugin with debug-symbols might be able to shed some more light. |
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The main issue is the Piano track: a combination of MIDI-Strum (sending unordered events) and MDA-Piano causing memory-corruption if it receives MIDI events that are not sorted by time. |
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Thanks, x42! I hould be able torestore this project to a working state knowing this. How have you found out what's the problem? Also: is that a problem in MDA Piano or MIDI Strum? Or both maybe? |
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MDA-piano.lv2 causes crashes when it receives MIDI events that are not correctly sorted. There are various ways to produce un-ordered MIDI events. e.g. connect multiple jack MIDI ports to a single target, or here: the MIDI Strum plugin. |
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Forwarded: http://dev.drobilla.net/ticket/1178 Also the MIDI-Strum plugin was changed to sort events to prevent this particular case: https://github.com/x42/midifilter.lv2/commit/6aa58936 (midifilter.lv2 v0.5.3-1 or upcoming v0.5.4 and later). |
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Closed - This is not an Ardour issue. |
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Uh... this certainly is an Ardour issue! Hosts are required to send ordered events to plugins, and plugins (like MIDI Strum) are required to output them in order as well. |
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Issue has been closed automatically, by Trigger Close Plugin. Feel free to re-open with additional information if you think the issue is not resolved. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2019-06-22 11:24 | unfa | New Issue | |
| 2019-06-22 11:24 | unfa | File Added: Dragonfly Reverb 2.tar.gz | |
| 2019-06-22 11:31 | unfa | Note Added: 0020677 | |
| 2019-06-22 11:59 | unfa | Note Added: 0020678 | |
| 2019-06-22 14:40 | x42 | Note Added: 0020679 | |
| 2019-06-22 14:41 | x42 | Note Edited: 0020679 | |
| 2019-06-22 19:14 | x42 | Note Added: 0020680 | |
| 2019-06-23 13:15 | unfa | Note Added: 0020681 | |
| 2019-06-23 13:57 | x42 | Note Added: 0020682 | |
| 2019-06-23 14:37 | x42 | Note Added: 0020683 | |
| 2019-06-23 14:37 | x42 | Assigned To | => x42 |
| 2019-06-23 14:37 | x42 | Status | new => resolved |
| 2019-06-23 14:37 | x42 | Resolution | open => no change required |
| 2019-06-23 14:37 | x42 | Note Added: 0020684 | |
| 2019-06-23 14:37 | x42 | Note Edited: 0020684 | |
| 2019-06-23 15:19 | drobilla | Note Added: 0020685 | |
| 2019-06-23 15:19 | drobilla | Note Edited: 0020685 | |
| 2020-04-19 20:18 | system | Note Added: 0023794 | |
| 2020-04-19 20:18 | system | Status | resolved => closed |
