[dpdk-dev] [PATCH v2] examples/ntb: fix build issue with GCC 13

[Gao, DaxueX]

> -----Original Message-----
> From: jerinj at marvell.com <jerinj at marvell.com>
> Sent: 2023年5月4日 16:54
> To: dev at dpdk.org; Wu, Jingjing <jingjing.wu at intel.com>; Guo, Junfeng
> <junfeng.guo at intel.com>; Li, Xiaoyun <xiaoyun.li at intel.com>
> Cc: thomas at monjalon.net; david.marchand at redhat.com;
> ferruh.yigit at amd.com; Jerin Jacob <jerinj at marvell.com>; stable at dpdk.org; Ali
> Alnubani <alialnu at nvidia.com>
> Subject: [dpdk-dev] [PATCH v2] examples/ntb: fix build issue with GCC 13
> 
> From: Jerin Jacob <jerinj at marvell.com>
> 
> Fix the following build issue by not allowing nb_ids to be zero.
> nb_ids can be zero based on rte_rawdev_xstats_get() API documentation but it
> is not valid for the case when second argument is NULL.
> 
> examples/ntb/ntb_fwd.c: In function 'ntb_stats_display':
> examples/ntb/ntb_fwd.c:945:23: error: 'rte_rawdev_xstats_get'
> accessing 8 bytes in a region of size 0 [-Werror=stringop-overflow=]
>   945 | if (nb_ids != rte_rawdev_xstats_get(dev_id, ids, values, nb_ids)) {
>       |
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> examples/ntb/ntb_fwd.c:945:23: note: referencing argument 3 of type
> 'uint64_t[0]' {aka 'long unsigned int[]'} In file included
> from ../examples/ntb/ntb_fwd.c:17:
> lib/rawdev/rte_rawdev.h:504:1: note: in a call to function
> 'rte_rawdev_xstats_get'
>   504 | rte_rawdev_xstats_get(uint16_t dev_id,
> 
> Fixes: 5194299d6ef5 ("examples/ntb: support more functions")
> Cc: stable at dpdk.org
> Signed-off-by: Jerin Jacob <jerinj at marvell.com>
> Tested-by: Ali Alnubani <alialnu at nvidia.com>
Tested-by: Daxue Gao <daxuex.gao at intel.com>