Re: Fwd: SDL2 applications crashing with SIGBUS

[Elias Bürli <ebuerli%gmail.com@localhost>]

Hello

> > For tyr-quake, I tried the pre-compiled package here:
> This is not suing SDL2 (AFAICT).
>
You are correct, I mistook it for an SDL application.
I was just looking for some pre-compiled similar game to try out to
see if it works better than the games compiled from source.

> SIGBUS - just like you see it. If you still have the core around, can
> you show the output of "bt" in gdb?

Yes, see below the backtrace from all 4 games:

1) chocolate-doom-setup:
Reading symbols from /usr/local/bin/chocolate-doom-setup...done.
[New process 1]
bt
Core was generated by `chocolate-doom-s'.
Program terminated with signal SIGBUS, Bus error.
#0  0x000000004209a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
(gdb) bt
#0  0x000000004209a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
#1  0x00000000405e41b8 in X11_InitKeyboard () from /usr/pkg/lib/libSDL2-2.0.so.0
#2  0x00000000405ebc90 in X11_VideoInit () from /usr/pkg/lib/libSDL2-2.0.so.0
#3  0x00000000405db804 in SDL_VideoInit_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#4  0x0000000040537aac in SDL_InitSubSystem_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#5  0x00000000405525c8 in SDL_Init () from /usr/pkg/lib/libSDL2-2.0.so.0
#6  0x000000000011980c in TXT_Init () at txt_sdl.c:233
#7  0x000000000010bab4 in InitTextscreen () at mainmenu.c:305
#8  0x000000000010bf20 in RunGUI () at mainmenu.c:330
#9  D_DoomMain () at mainmenu.c:346
#10 0x000000000011df34 in main (argc=<optimized out>,
argv=0xffffffffffffd718) at i_main.c:48
(gdb)

2) chocolate-doom:
Reading symbols from /usr/local/bin/chocolate-doom...done.
[New process 1]
[New process 3]
[New process 2]
Core was generated by `chocolate-doom'.
Program terminated with signal SIGBUS, Bus error.
#0  0x0000000043c9a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
[Current thread is 1 (LWP 1)]
(gdb) bt
#0  0x0000000043c9a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
#1  0x00000000406e41b8 in X11_InitKeyboard () from /usr/pkg/lib/libSDL2-2.0.so.0
#2  0x00000000406ebc90 in X11_VideoInit () from /usr/pkg/lib/libSDL2-2.0.so.0
#3  0x00000000406db804 in SDL_VideoInit_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#4  0x0000000040637aac in SDL_InitSubSystem_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#5  0x00000000406525c8 in SDL_Init () from /usr/pkg/lib/libSDL2-2.0.so.0
#6  0x0000000000112b28 in I_InitGraphics () at i_video.c:1356
#7  0x000000000012a5e4 in D_DoomLoop () at d_main.c:449
#8  0x000000000012c21c in D_DoomMain () at d_main.c:1895
#9  0x000000000016dcb4 in main (argc=<optimized out>,
argv=0xffffffffffffd6a8) at i_main.c:48
(gdb)

3) dunelegacy:
Thread 1 received signal SIGBUS, Bus error.
0x000000004239a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
(gdb) bt
#0  0x000000004239a534 in XkbSetDetectableAutoRepeat () from
/usr/pkg/lib/libX11.so.6
#1  0x00000000408e41b8 in X11_InitKeyboard () from /usr/pkg/lib/libSDL2-2.0.so.0
#2  0x00000000408ebc90 in X11_VideoInit () from /usr/pkg/lib/libSDL2-2.0.so.0
#3  0x00000000408db804 in SDL_VideoInit_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#4  0x0000000040837aac in SDL_InitSubSystem_REAL () from
/usr/pkg/lib/libSDL2-2.0.so.0
#5  0x00000000408525c8 in SDL_Init () from /usr/pkg/lib/libSDL2-2.0.so.0
#6  0x0000000000348b3c in main ()
(gdb)

4) And for what it's worth tyr-quake. This is from the stripped binary
from pkgsrc, so I assume a binary compiled from source would maybe
show more details?
But it seems to be failing also at a keyboard related part in libX11:
Program received signal SIGSEGV, Segmentation fault.
0x0000000040923ca4 in XChangeKeyboardControl () from /usr/pkg/lib/libX11.so.6
(gdb) bt
#0  0x0000000040923ca4 in XChangeKeyboardControl () from
/usr/pkg/lib/libX11.so.6
#1  0x0000000040923760 in XAutoRepeatOn () from /usr/pkg/lib/libX11.so.6
#2  0x000000000016388c in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)

Best regards
Elias


On Tue, Jan 22, 2019 at 3:59 PM Martin Husemann <martin%duskware.de@localhost> wrote:
>
> On Mon, Jan 21, 2019 at 05:57:40PM +0100, Elias Bürli wrote:
> > For tyr-quake, I tried the pre-compiled package here:
> > ftp://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/games/tyrquake/README.html
> > which also needs at least the shareware data:
> > ftp://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/games/quakedata/README.html
> > It successfully shows the splash screen, and if I hit ESC fast enough
> > I can get into the menu, but it crashes when trying to start a new
> > game.
>
> This is not suing SDL2 (AFAICT).
>
> > I was also expecting the issue to be in the game source itself, which
> > is why I find the gdb reference to "XkbSetDetectableAutoRepeat () from
> > /usr/pkg/lib/libX11.so.6" confusing.
>
> Well:
>
> extern  Bool    XkbSetDetectableAutoRepeat(
>         Display *               /* dpy */,
>         Bool                    /* detectable */,
>         Bool *                  /* supported */
> );
>
> and "Bool" is int in X terms - so on sparc64 the last arg ("supported") will
> need to be a properly aligned pointer, failure to do that will lead to a
> SIGBUS - just like you see it. If you still have the core around, can
> you show the output of "bt" in gdb?
>
> Martin