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Bug 1313 - Segfault on SDL_CreateWindow when gl lib cannot be loaded
Summary: Segfault on SDL_CreateWindow when gl lib cannot be loaded
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: 2011-10-12 01:45 UTC by Carles Pagès
Modified: 2012-01-07 21:04 UTC (History)
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Description Carles Pagès 2011-10-12 01:45:15 UTC 
Hi,

I'm getting a segfault in SDL_CreateWindow, when running an app using virtualgl. The problem is that the return value of SDL_GL_LoadLibrary is not checked in that function (SDL_video.c: 1154), and later on the call to:
vinfo = _this->gl_data->glXChooseVisual(display, screen, attribs); (in SDL_x11opengl.c: 394)
segfaults as gl_data is zero.

I still have to check why the gl library does not load, but checking the return code of SDL_GL_LoadLibrary should prevent the segfault.

Thanks!
Comment 1 Sam Lantinga 2012-01-07 21:04:28 UTC 
It's okay for loading the OpenGL library to fail, but the window code should handle it.
This is fixed in the latest snapshot:
http://hg.libsdl.org/SDL/rev/e29f01fa2750

Thanks!