Created attachment 761469 [details] emerge --info It is kind a little bit sad but dosbox-staging (all versions presently in the tree) crash straight away after 1 ms belgix@darwin ~ $ dosbox date time | 2022-01-07 18:39:56.863 | arguments: dosbox 2022-01-07 18:39:56.863 | Current dir: /home/belgix 2022-01-07 18:39:56.863 | stderr verbosity: 0 2022-01-07 18:39:56.863 | ----------------------------------- 2022-01-07 18:39:56.864 | dosbox-staging version 0.78.0 2022-01-07 18:39:56.864 | --- Loguru caught a signal: SIGSEGV Stack trace: 0 0x7fec865479d0 /lib64/libc.so.6(+0x3d9d0) [0x7fec865479d0] 2022-01-07 18:39:57.010 | Signal: SIGSEGV Segmentation fault Workaround ---------- The thing that will make debugging harder, dosbox doesn't crash and run normally if I run the process in the debugger using that command gdb -ex='set confirm on' -ex=run -ex=quit dosbox AFAIK, the crash is not related to my dosbox-staging.conf file. The same problem happens with the default config file.
Further comment. Dosbox crash when creating a thread, before reading the config file. GNU gdb (Gentoo 11.1 vanilla) 11.1 Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://bugs.gentoo.org/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from dosbox... (No debugging symbols found in dosbox) Starting program: /usr/bin/dosbox [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". date time | 2022-01-07 19:12:05.448 | arguments: /usr/bin/dosbox 2022-01-07 19:12:05.448 | Current dir: /home/belgix 2022-01-07 19:12:05.448 | stderr verbosity: 0 2022-01-07 19:12:05.448 | ----------------------------------- 2022-01-07 19:12:05.449 | dosbox-staging version 0.78.0 2022-01-07 19:12:05.449 | --- [New Thread 0x7fffe42a3640 (LWP 3706)] 2022-01-07 19:12:05.725 | CONFIG: Loaded primary conf file /home/belgix/.config/dosbox/dosbox-staging.conf 2022-01-07 19:12:05.725 | DISPLAY: Initialized 840x630 window-mode using Bilinear scaling on 900p display-0 2022-01-07 19:12:05.747 | DISPLAY: Unknown 640x400 (mode FFFFh) scaling by 1.3x1.6 to 840x630 with 1.20 pixel-aspect 2022-01-07 19:12:05.849 | SDL: Using driver "software" for texture renderer 2022-01-07 19:12:06.874 | SDL: Mouse will move seamlessly without being captured and middle-click will uncapture the mouse. 2022-01-07 19:12:06.874 | LANG: Using internal English language messages 2022-01-07 19:12:06.910 | MEMORY: Base address: 0x7fffde7ff010 2022-01-07 19:12:06.910 | MEMORY: Using 4096 DOS memory pages (16 MiB) 2022-01-07 19:12:06.913 | VIDEO: Initialized S3 Trio64 VESA 2.0 compatible with 4-MiB of FP DRAM supporting 86 modes [New Thread 0x7fffcdbfb640 (LWP 3741)] 2022-01-07 19:12:06.924 | MIXER: SDL changed the blocksize from 512 to 256 frames 2022-01-07 19:12:06.924 | MIXER: Negotiated 2-channel 48000-Hz audio in 256-frame blocks 2022-01-07 19:12:06.924 | MIDI: No working MIDI device found/selected. 2022-01-07 19:12:06.924 | MIDI: Opened device: none 2022-01-07 19:12:06.924 | MIXER: FM channel operating at 48000 Hz without resampling 2022-01-07 19:12:06.924 | MIXER: SB channel operating at 22050 Hz and upsampling to the output rate 2022-01-07 19:12:06.924 | SB16: @SET BLASTER=A220 I7 D1 H5 T6 2022-01-07 19:12:06.924 | MIXER: SPKR channel operating at 18939 Hz and upsampling to the output rate 2022-01-07 19:12:06.924 | MIXER: DISNEY channel operating at 10000 Hz and upsampling to the output rate 2022-01-07 19:12:06.926 | AUTOEXEC: Using autoexec from one or more joined sections 2022-01-07 19:12:06.926 | MAPPER: joystick subsystem disabled 2022-01-07 19:12:06.927 | MAPPER: Loaded default key bindings 2022-01-07 19:12:06.928 | MOUNT: Path '~/.dosbox' found 2022-01-07 19:12:06.938 | DISPLAY: Text 640x400 (mode 3h) scaling by 1.3x1.6 to 840x630 with 1.20 pixel-aspect 2022-01-07 19:12:06.983 | PACER: Render took 10601us, skipping next 2022-01-07 19:12:07.012 | PACER: Render took 17817us, skipping next 2022-01-07 19:12:07.391 | PACER: Render took 11313us, skipping next 2022-01-07 19:12:07.848 | PACER: Render took 12529us, skipping next 2022-01-07 19:12:08.317 | PACER: Render took 23600us, skipping next 2022-01-07 19:12:08.766 | PACER: Render took 13477us, skipping next 2022-01-07 19:12:09.221 | PACER: Render took 11356us, skipping next 2022-01-07 19:12:09.676 | PACER: Render took 10447us, skipping next 2022-01-07 19:12:10.137 | PACER: Render took 13884us, skipping next [Thread 0x7fffcdbfb640 (LWP 3741) exited] [Thread 0x7fffe42a3640 (LWP 3706) exited] 2022-01-07 19:12:10.345 | atexit [Inferior 1 (process 3699) exited normally]
This is a strange one, I suspect the recent bugfix bump 0.78.1 will not help here... I suspect original dosbox does not show the issue? Have you tried changing USE=opengl and USE=dynrec values (the other USE flags should not have an impact) One other thing to try is to run the test suite with FEATURES=test, if these fail it could bring useful info.
(In reply to Bernard Cafarelli from comment #2) As expected (because dosbox crash before reading dosbox-staging.conf file), no difference if OPENGL or DYNREC flags are enabled or not. My default compilation settings is with both not enabled (which is also the Gentoo default if you don't change any USE flags). I'm just disabling FLUIDSYN because don't need the MIDI stuff. To compile with TEST flag enabled, I didn't try personally but it seems there is another bug that prevent compiling with that flag on. See https://bugs.gentoo.org/830930
(In reply to Bernard Cafarelli from comment #2) > This is a strange one, I suspect the recent bugfix bump 0.78.1 will not help > here... It might not be related to this bugfix because I got the same issue with 0.76.x and 0.77.x (so, all the ones presently in Portage tree).
(In reply to Bernard Cafarelli from comment #2) > This is a strange one, I suspect the recent bugfix bump 0.78.1 will not help > here... I didn't notice we got a new version overnight. Well for that one, wrong answer. The issue has been fixed in 0.78.1 at least with the default USE flags (no OPENGL, no DYNREC). Feel free to close the issue if you think this new version don't need to be tested with OPENGL flag enabled.
(In reply to Bernard Cafarelli from comment #2) > This is a strange one, I suspect the recent bugfix bump 0.78.1 will not help > here... > Forgot what I wrote in Comment 5. The bug is still there in 0.78.1 but the things get muddier because dosbox just works fine outside the debugger in a remote vnc connection Configuration known to work 1) In the debugger session (gdb) for KDE5 & openbox 2) In tigervnc - debugger is not required Not working 1) In KDE5 outside a debugger session 2) In openbox outside a debugger session Tigervnc & gdb seems to add some overhead that prevent triggering the bug.
I found it. After analyzing the code, I found the problem is when dosbox try to initialize SDL library. It just goes in nuts on my system if media-libs/libSDL2-2.0.20 is compiled with OPENGL flag enabled. I recompiled libSDL2 disabling opengl flag and now dosbox just works fine. Offending lines in dosbox-staging-0.73.1 are lines 3924 or 3926 in src/gui/sdlmain.cpp 3924 check_kmsdrm_setting(); 3925 3926 if (SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO) < 0) 3927 E_Exit("Can't init SDL %s", SDL_GetError()); 3928 sdl.initialized = true; 3929 // Once initialized, ensure we clean up SDL for all exit conditions 3930 atexit(QuitSDL);
