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+--- Thread: 2008 Refactor branch problem (/showthread.php?tid=962)
2008 Refactor branch problem - FFuser - 06-11-2008
Hi
I'm intrested in the 2008 refactor (I hope we do not get a 2009, 2010, ..., refactorings) so I tried it out.
After some fiddling with SConscript (to remove the libbulletcollision) and src/pathmanager.cpp (to hardcodde "data") it compiled and started to run somewhat.
It segfaulted
Quote:nathan@gamma:~/Documenten/bronnen/vdrift-branch$ ./build/vdrift
Starting VDrift: development-full, 2029M
Home directory: /home/nathan
Settings file: /home/nathan/.vdrift/VDrift.config
Data directory: data
ALSA lib pcm_dmix.c:874snd_pcm_dmix_open) unable to open slave
SDL initialization successful
Segmentatiefout
A ran it with GDB and got the following output:
Quote:Starting program: /home/nathan/Documenten/bronnen/vdrift-branch/build/vdrift
[Thread debugging using libthread_db enabled]
Starting VDrift: development-full, 2029M
Home directory: /home/nathan
Settings file: /home/nathan/.vdrift/VDrift.config
Data directory: data
[New Thread 0x7fb6b31626f0 (LWP 8726)]
ALSA lib pcm_dmix.c:874
SDL initialization successful
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fb6b31626f0 (LWP 8726)]
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00000000004487c1 in OPENGL_UTILITY::CheckForOpenGLErrors (
activity_description=@0x7fffbb18de20, error_output=@0x694cc0)
at src/opengl_utility.cpp:5
#2 0x000000000042a2f5 in GRAPHICS_SDLGL::Init (this=0x7fffbb18e078,
texturepath=@0x7fffbb18dff0, shaderpath=@0x7fffbb18dfe0, resx=800,
resy=600, bpp=16, depthbpp=24, fullscreen=false, shaders=false,
info_output=@0x694ac0, error_output=@0x694cc0) at src/graphics.cpp:44
#3 0x000000000041dcdd in GAME::Start (this=0x7fffbb18e050,
args=@0x7fffbb18e520) at src/game.cpp:41
#4 0x000000000043e8ac in main (argc=1, argv=0x7fffbb18e638) at src/main.cpp:21
Removing the code in the function OPENGL_UTILITY::CheckForOpenGLErrors made the game run and work (I could start a practice race, the only thing I could do their was moving my point of view, driving etc didn't work but I guess that is Not Yet (Re)Implemented).
So any idea why VDrift is crashing?
- joevenzon - 06-11-2008
Hey, thanks for trying the refactor! Yeah, so far only basic track loading and some GUI functionality is done. I've just barely started work on re-implementing the car physics.
It looks like it's crashing on the line:
Code:
GLenum gl_error = glGetError();That's pretty weird. What kind of graphics card, drivers, etc do you have?
- FFuser - 06-12-2008
Yeah, I had to mention them in the first place :oops:
Intel (GMA 950, not the best card, I know) and the intel xserver-xorg-video-intel 2.2.1(-1ubuntu13) on Ubuntu Hardy.
Previous version of VDrift, and other 3D games do work without problems (and as said, without that line it works perfectly too).
- joevenzon - 06-12-2008
Are there any newer xserver versions or drivers you could try?
If not, is there some kind of if statement we could come up with so that the line isn't executed if it'll cause a crash?
- FFuser - 06-12-2008
joevenzon Wrote:Are there any newer xserver versions or drivers you could try?Maybe, compiling intel drivers is not really what I want, but I could try.
EDIT: Well, I recompiled (Used git for that, probably not the best idea) them and ended up with no direct rendering..., i uninstalled them and ended up with no X..., I reinstalled the normal ubuntu packages and everything was working again...
So far for trying recompiling the drivers...
Quote:If not, is there some kind of if statement we could come up with so that the line isn't executed if it'll cause a crash?
I guess I should have a look on the internet.
EDIT: no-one else seems to have this problem
- FFuser - 06-13-2008
I debugged some more:
I do have 2 executables: vdrift and vdrift-crash
vdrift doesn't have the offending line, vdrift-crash has
When I delete ~/.vdrift vdrift-crash crashes, and ./vdrift doesn't
The backtrace looks different (but I remember the first time I had the problem it was like this)
Quote:(gdb) bt(Now it crashes in Xrandr)
#0 0x00007f92220312e8 in ?? () from /usr/lib/libXrandr.so.2
#1 0x0000000000448821 in OPENGL_UTILITY::CheckForOpenGLErrors (
activity_description=@0x7fff2fbd4870, error_output=@0x694ce0)
at src/opengl_utility.cpp:5
#2 0x000000000042a355 in GRAPHICS_SDLGL::Init (this=0x7fff2fbd4ac8,
texturepath=@0x7fff2fbd4a40, shaderpath=@0x7fff2fbd4a30, resx=800,
resy=600, bpp=16, depthbpp=24, fullscreen=false, shaders=false,
info_output=@0x694ae0, error_output=@0x694ce0) at
src/graphics.cpp:44
#3 0x000000000041dd3d in GAME::Start (this=0x7fff2fbd4aa0,
args=@0x7fff2fbd4f70) at src/game.cpp:41
#4 0x000000000043e90c in main (argc=1, argv=0x7fff2fbd5088) at
src/main.cpp:21
When I run the vdrift trunk (~/.vdrift is created) and disable shaders all versions seem to run correctly (vdrift-crash doesn't crash anymore)
- joevenzon - 06-13-2008
Can you try commenting out graphics.cpp line 44 in the crashing version of the refactor? Maybe I'm trying to do the openGL get error function before I'm supposed to.
- FFuser - 06-13-2008
joevenzon Wrote:Can you try commenting out graphics.cpp line 44 in the crashing version of the refactor? Maybe I'm trying to do the openGL get error function before I'm supposed to.
That does the trick, it works now
- joevenzon - 06-13-2008
Ah hah! I'll make the change and commit it.
Thanks for testing that out!