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Crash in X11_GL_GetVisual (Patch attached) #98

SDLBugzilla opened this issue Feb 10, 2021 · 0 comments

Crash in X11_GL_GetVisual (Patch attached) #98

SDLBugzilla opened this issue Feb 10, 2021 · 0 comments


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@SDLBugzilla SDLBugzilla commented Feb 10, 2021

This bug report was migrated from our old Bugzilla tracker.

These attachments are available in the static archive:

Reported in version: HG 2.0
Reported for operating system, platform: Linux, x86

Comments on the original bug report:

On 2008-07-06 14:53:17 +0000, wrote:

Using the following sequence

SDL_CreateWindow(..., SDL_WINDOW_OPENGL)
SDL_CreateWindow(..., SDL_WINDOW_OPENGL)

SDL will crash in X11_GL_GetVisual. This is due to the fact that
during SDL_DestroyWindow X11_GL_Shutdown was called because the last window
has been closed.

On the next call to SDL_CreateWindow the library is still loaded and only the memory is reinitialized. Function pointers such as gl_data->glXChooseVisual will not be reinitialized.

Consequently, SDL will crash due to a NULL pointer access.

The attached patch corrects the behaviour.

On 2008-07-06 14:56:11 +0000, wrote:

Created attachment 257
Patch to solve issue

On 2008-08-25 19:50:36 +0000, Sam Lantinga wrote:


Committed revision 4047.

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