gallium: implement bounds checking for constant buffers

Plumb the constant buffer sizes down into the tgsi interpreter where
we can do bounds checking.  Optional debug code warns upon out-of-bounds
reading.  Plus add a few other assertions in the TGSI interpreter.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_state_fs.c b/src/gallium/drivers/softpipe/sp_state_fs.c
index 3fbf1f2578..ded242d3dc 100644
--- a/src/gallium/drivers/softpipe/sp_state_fs.c
+++ b/src/gallium/drivers/softpipe/sp_state_fs.c
@@ -195,6 +195,8 @@ softpipe_set_constant_buffer(struct pipe_context *pipe,
    }
 
    softpipe->mapped_constants[shader][index] = data;
+   softpipe->const_buffer_size[shader][index] = size;
+
    softpipe->dirty |= SP_NEW_CONSTANTS;
 }