Re: [Qemu-devel] [PATCH v3 13/13] linux-user/strace: Improve recvfrom() output

[Laurent Vivier <laurent@vivier.eu>]

Le 02/07/2018 à 19:50, Philippe Mathieu-Daudé a écrit :
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Tested-By: Guido Günther <agx@sigxcpu.org>
> ---
>  linux-user/strace.c    | 16 ++++++++++++++++
>  linux-user/strace.list |  2 +-
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/linux-user/strace.c b/linux-user/strace.c
> index f80d655835..a85b4a10e5 100644
> --- a/linux-user/strace.c
> +++ b/linux-user/strace.c
> @@ -2008,6 +2008,22 @@ print_getsockname(const struct syscallname *name,
>  }
>  #endif
>  
> +#if defined(TARGET_NR_recvfrom)
> +static void
> +print_recvfrom(const struct syscallname *name,
> +               abi_long arg0, abi_long arg1, abi_long arg2,
> +               abi_long arg3, abi_long arg4, abi_long arg5)
> +{
> +    print_syscall_prologue(name);
> +    print_raw_param("%d", arg0, 0);
> +    print_buf(arg1, arg2, 0);

The content of the buffer is not relevant here as it is displayed before
the data are received. I think you should only print the pointer and the
length.

Thanks,
Laurent