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Bug 748 - creating a window segfaults if gtk inited before SDL (1.3)
Summary: creating a window segfaults if gtk inited before SDL (1.3)
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: HG 2.0
Hardware: x86 Linux
: P2 normal
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-06-04 20:25 UTC by Gerry JJ
Modified: 2013-05-21 01:07 UTC (History)
1 user (show)

See Also:

Attachments
segfault example (524 bytes, application/octet-stream)
2009-06-04 20:25 UTC, Gerry JJ 		Details
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Description Gerry JJ 2009-06-04 20:25:37 UTC 
Created attachment 328 [details]
segfault example

Current SDL 1.3 svn segfaults (inside X) if these functions are called in this order:

1. gtk_init (or gtk_init_check, etc)
2. SDL_Init(SDL_INIT_VIDEO) (or SDL_VideoInit)
3. SDL_SetVideoMode (or SDL_CreateWindow) <- segfault

In SDL 1.2, there's no segfault and SetVideoMode succeeds.  Also, it works fine in 1.3 too if SDL_Init is moved to before gtk_init:

1. SDL_Init(SDL_INIT_VIDEO)
2. gtk_init
3. SDL_SetVideoMode <- segfault

Attached an example.  Also, here's a gdb backtrace of that with SDL 1.3 and gtk inited before SDL:

(gdb) bt
#0  0x00007f615aa8f22e in XCreateIC () from /usr/lib/libX11.so.6
#1  0x00007f615ea9afbc in SetupWindowData (_this=0x24fa8a0, window=0x7fff66ef82f0, w=79691778, created=1 '\001')
    at ../SDL-1.3/src/video/x11/SDL_x11window.c:82
#2  0x00007f615ea9c59e in X11_CreateWindow (_this=0x24fa8a0, window=0x7fff66ef82f0) at ../SDL-1.3/src/video/x11/SDL_x11window.c:690
#3  0x00007f615ea83100 in SDL_CreateWindow (title=0x0, x=134217727, y=134217727, w=320, h=240, flags=4) at ../SDL-1.3/src/video/SDL_video.c:790
#4  0x00007f615e9d5463 in SDL_SetVideoMode (width=320, height=240, bpp=0, flags=0) at ../SDL-1.3/src/SDL_compat.c:556
#5  0x0000000000400a61 in main ()

This is on Arch Linux, 64-bit, with SDL 1.3 rev 4529 and gtk 2.16.2, xorg-server 1.6.1.901
Comment 1 Gerry JJ 2009-06-04 20:29:04 UTC 
Oops .. the "segfaults" in that second list should be "works":

1. SDL_Init(SDL_INIT_VIDEO)
2. gtk_init
3. SDL_SetVideoMode <- works!
Comment 2 Sam Lantinga 2010-07-17 23:45:52 UTC 
I just tried this on Ubuntu 10.04 with and without SDL_BEFORE_GTK defined and I got "creating window... success!" output both times.

Are you still getting this error with the latest SDL snapshot?
http://www.libsdl.org/tmp/SDL-1.3.zip
Comment 3 Gerry JJ 2010-07-18 09:38:15 UTC 
(In reply to comment #2)
> Are you still getting this error with the latest SDL snapshot?
> http://www.libsdl.org/tmp/SDL-1.3.zip

Yes, it's segfaulting in the same place when SDL_BEFORE_GTK is undefined, but works when SDL_BEFORE_GTK is defined, as before.  Still Arch 64-bit, gtk now at 2.20.1-2 and xorg-server at 1.8.1.902-1. Standard Arch packages, not using anything custom there.
Comment 4 Sam Lantinga 2013-05-21 01:07:26 UTC 
I believe this is fixed in the latest snapshot:
http://www.libsdl.org/tmp/SDL-2.0.zip

This was related to X locale support.

Please reopen this bug for SDL 2.1 if it's still active.

Thanks!