intel: assert that we do not overflow the batch buffer.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_batchbuffer.c b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
index 9261f2ffd8..4c99dcde23 100644
--- a/src/mesa/drivers/dri/intel/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
@@ -158,9 +158,10 @@ _intel_batchbuffer_flush(struct intel_batchbuffer *batch, const char *file,
    }
 
    /* Mark the end of the buffer. */
-   *(GLuint *) (batch->ptr) = MI_BATCH_BUFFER_END; /* noop */
+   *(GLuint *) (batch->ptr) = MI_BATCH_BUFFER_END;
    batch->ptr += 4;
    used = batch->ptr - batch->map;
+   assert (used <= batch->buf->size);
 
    /* Workaround for recursive batchbuffer flushing: If the window is
     * moved, we can get into a case where we try to flush during a