[dpdk-dev] [PATCH 05/10] app/test: fix maybe-uninitialized warnings for LTO build

[Chas Williams]

On 9/5/19 5:32 AM, Andrzej Ostruszka wrote:
> During LTO build compiler reports some 'false positive' warnings about
> variables being possibly used uninitialized.  This patch silences these
> warnings.
> 
> Signed-off-by: Andrzej Ostruszka <aostruszka at marvell.com>
> ---
>   app/test/test_hash_readwrite.c     | 2 +-
>   app/test/test_link_bonding_mode4.c | 6 ++++--
>   app/test/test_memzone.c            | 3 ++-
>   3 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/app/test/test_hash_readwrite.c b/app/test/test_hash_readwrite.c
> index 4376b099b..615767fb6 100644
> --- a/app/test/test_hash_readwrite.c
> +++ b/app/test/test_hash_readwrite.c
> @@ -298,7 +298,7 @@ test_rw_reader(void *arg)
>   
>   	begin = rte_rdtsc_precise();
>   	for (i = 0; i < read_cnt; i++) {
> -		void *data;
> +		void *data = arg;
>   		rte_hash_lookup_data(tbl_rw_test_param.h,
>   				tbl_rw_test_param.keys + i,
>   				&data);
> diff --git a/app/test/test_link_bonding_mode4.c b/app/test/test_link_bonding_mode4.c
> index bbb4e9cce..8ca376dda 100644
> --- a/app/test/test_link_bonding_mode4.c
> +++ b/app/test/test_link_bonding_mode4.c
> @@ -224,7 +224,7 @@ configure_ethdev(uint16_t port_id, uint8_t start)
>   static int
>   add_slave(struct slave_conf *slave, uint8_t start)
>   {
> -	struct rte_ether_addr addr, addr_check;
> +	struct rte_ether_addr addr, addr_check = { { 0 } };
>   
>   	/* Some sanity check */
>   	RTE_VERIFY(test_params.slave_ports <= slave &&
> @@ -578,7 +578,9 @@ bond_get_update_timeout_ms(void)
>   {
>   	struct rte_eth_bond_8023ad_conf conf;
>   
> -	rte_eth_bond_8023ad_conf_get(test_params.bonded_port_id, &conf);
> +	if (rte_eth_bond_8023ad_conf_get(test_params.bonded_port_id, &conf) < 0)
> +		return 0;
> +

This would return a delay of 0ms, which doesn't feel like it captures 
the intent of conf_get failing. Perhaps a TEST_ASSERT_FAILURE() instead?

>   	return conf.update_timeout_ms;
>   }
>   
> diff --git a/app/test/test_memzone.c b/app/test/test_memzone.c
> index 7501b63c5..c284dcb44 100644
> --- a/app/test/test_memzone.c
> +++ b/app/test/test_memzone.c
> @@ -476,7 +476,8 @@ find_max_block_free_size(unsigned int align, unsigned int socket_id)
>   	struct rte_malloc_socket_stats stats;
>   	size_t len, overhead;
>   
> -	rte_malloc_get_socket_stats(socket_id, &stats);
> +	if (rte_malloc_get_socket_stats(socket_id, &stats) < 0)
> +		return 0;
>   
>   	len = stats.greatest_free_size;
>   	overhead = MALLOC_ELEM_OVERHEAD;
>