net/mlx: add debug checks to glue structure

Partial-bug: #1783471
This code should catch mistakes early if a glue structure member is added
without a corresponding implementation in the library.

Change-Id: I99973073e29900b51ea2cf4553c05c9d028c8aff
Signed-off-by: matan <matan@mellanox.com>

drivers/net/mlx4/mlx4.c

@@ -777,6 +777,15 @@ rte_mlx4_pmd_init(void)
 	if (mlx4_glue_init())
 		return;
 	assert(mlx4_glue);
+#endif
+#ifndef NDEBUG
+	/* Glue structure must not contain any NULL pointers. */
+	{
+		unsigned int i;
+
+		for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
+			assert(((const void *const *)mlx4_glue)[i]);
+	}
 #endif
 	mlx4_glue->fork_init();
 	rte_pci_register(&mlx4_driver);

drivers/net/mlx5/mlx5.c

@@ -1230,6 +1230,15 @@ rte_mlx5_pmd_init(void)
 	if (mlx5_glue_init())
 		return;
 	assert(mlx5_glue);
+#endif
+#ifndef NDEBUG
+	/* Glue structure must not contain any NULL pointers. */
+	{
+		unsigned int i;
+
+		for (i = 0; i != sizeof(*mlx5_glue) / sizeof(void *); ++i)
+			assert(((const void *const *)mlx5_glue)[i]);
+	}
 #endif
 	mlx5_glue->fork_init();
 	rte_pci_register(&mlx5_driver);