[Mesa-dev] State tracker pipe_surface woes...

Stéphane Marchesin stephane.marchesin at gmail.com
Fri Sep 2 11:25:16 PDT 2011


While debugging some code I ran across the following situation:

- pipe_context c1 is created
- pipe_surface s1 is created
- strb-> surface is set to s1 (s1's refcount goes up)
- pipe_context c1 is destroyed
- strb is destroyed
- strb->surface is destroyed (so s1's refcount is now 0 and we want to
destroy it)

At that point s1 references c1 which is not available any more, so
when we try to call ctx->surface_destroy to destroy s1 we crash.

We discussed this a bit on IRC, and we agreed that the proper
solution, since surfaces outlive their context, is to make surfaces
screen-bound instead. I'm going to  implement that unless someone

As a side note, the same issue will happen with sampler_views, so
it'll get a similar fix.


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