misc: add gdb helpers for vlib buffers

Type: feature

Change-Id: I7e619040857310fffd33c355f6c491a55f7a4a02
Signed-off-by: Benoît Ganne <bganne@cisco.com>
diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h
index cfb4834..58abdb1 100644
--- a/src/vlib/buffer_funcs.h
+++ b/src/vlib/buffer_funcs.h
@@ -474,6 +474,13 @@
 u8 *vlib_validate_buffer (vlib_main_t * vm, u32 buffer_index,
 			  uword follow_chain);
 
+u8 *vlib_validate_buffers (vlib_main_t * vm,
+			   u32 * buffers,
+			   uword next_buffer_stride,
+			   uword n_buffers,
+			   vlib_buffer_known_state_t known_state,
+			   uword follow_buffer_next);
+
 static_always_inline vlib_buffer_pool_t *
 vlib_get_buffer_pool (vlib_main_t * vm, u8 buffer_pool_index)
 {