Re: [Qemu-devel] [PATCH v2 5/5] linux-user/elfload: Fix GCC 9 build warnings

[Laurent Vivier <laurent@vivier.eu>]

On 01/05/2019 01:29, Alistair Francis wrote:
> Fix this warning when building with GCC9 on Fedora 30:
> In function ‘strncpy’,
>     inlined from ‘fill_psinfo’ at /home/alistair/qemu/linux-user/elfload.c:3208:12,
>     inlined from ‘fill_note_info’ at /home/alistair/qemu/linux-user/elfload.c:3390:5,
>     inlined from ‘elf_core_dump’ at /home/alistair/qemu/linux-user/elfload.c:3539:9:
> /usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound 16 equals destination size [-Werror=stringop-truncation]
>   106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
>       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  linux-user/elfload.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/linux-user/elfload.c b/linux-user/elfload.c
> index c1a26021f8..d08fe23466 100644
> --- a/linux-user/elfload.c
> +++ b/linux-user/elfload.c
> @@ -2872,7 +2872,7 @@ struct target_elf_prpsinfo {
>      target_gid_t pr_gid;
>      target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
>      /* Lots missing */
> -    char    pr_fname[16];           /* filename of executable */
> +    char    pr_fname[16] QEMU_NONSTRING; /* filename of executable */
>      char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
>  };
>  
> 


Applied to my linux-user branch.

Thanks,
Laurent