On 6 March 2017 at 12:27, Tapani Pälli <tapani.pa...@intel.com> wrote:
> Function droid_swap_buffers may get called without dri2_surf->buffer set,
> in these cases we don't have a back buffer set either. Patch fixes segfault
> seen with 3DMark that uses android.opengl.GLSurfaceView for rendering it's UI.
>
> backtrace:
> #00 pc 00013f88 /system/lib/egl/libGLES_mesa.so (droid_swap_buffers+104)
> #01 pc 000117b2 /system/lib/egl/libGLES_mesa.so (dri2_swap_buffers+50)
> #02 pc 000058b2 /system/lib/egl/libGLES_mesa.so (eglSwapBuffers+386)
> #03 pc 00011329 /system/lib/libEGL.so (eglSwapBuffersWithDamageKHR+553)
> #04 pc 000118e7 /system/lib/libEGL.so (eglSwapBuffers+55)
> #05 pc 000754dc /system/lib/libandroid_runtime.so
>
> Fixes: 2acc69d ("EGL/Android: Add EGL_EXT_buffer_age extension")
> Signed-off-by: Tapani Pälli <tapani.pa...@intel.com>
> ---
> src/egl/drivers/dri2/platform_android.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/src/egl/drivers/dri2/platform_android.c
> b/src/egl/drivers/dri2/platform_android.c
> index 14e13b8..d2769b8 100644
> --- a/src/egl/drivers/dri2/platform_android.c
> +++ b/src/egl/drivers/dri2/platform_android.c
> @@ -634,7 +634,9 @@ droid_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp,
> _EGLSurface *draw)
> if (dri2_surf->color_buffers[i].age > 0)
> dri2_surf->color_buffers[i].age++;
> }
> - dri2_surf->back->age = 1;
> +
> + if (dri2_surf->back)
> + dri2_surf->back->age = 1;
>
It seems like we're papering over the problem:
Both wayland and drm call get_back_bo() prior to touching
dri2_surf->back. Why we don't want to do the same here ?
Seems like my "we want to unify the implementations [or bad things
might happen]" kicked in earlier than expected :-\
-Emil
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