Re: [PATCH v2 7/9] gdbstub: Replace alloca() + memset(0) by g_new0()

[Alex Bennée]

Philippe Mathieu-Daudé <philmd@redhat.com> writes:

> The ALLOCA(3) man-page mentions its "use is discouraged".
>
> Replace the alloca() and memset(0) calls by g_new0().
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Please see:

  Subject: [ALT PATCH] gdbstub: Replace GdbCmdContext with plain g_array()
  Date: Thu,  6 May 2021 17:07:41 +0100
  Message-Id: <20210506160741.9841-1-alex.bennee@linaro.org>

which also includes elements of 6/9 which can be kept split off.

> ---
>  gdbstub.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/gdbstub.c b/gdbstub.c
> index 7cee2fb0f1f..666053bf590 100644
> --- a/gdbstub.c
> +++ b/gdbstub.c
> @@ -1487,14 +1487,13 @@ static int process_string_cmd(void *user_ctx, const 
> char *data,
>          if (cmd->schema) {
>              int schema_len = strlen(cmd->schema);
>              int max_num_params = schema_len / 2;
> +            g_autofree GdbCmdVariant *params = NULL;
>  
>              if (schema_len % 2) {
>                  return -2;
>              }
>  
> -            gdb_ctx.params = (GdbCmdVariant *)alloca(sizeof(*gdb_ctx.params)
> -                                                     * max_num_params);
> -            memset(gdb_ctx.params, 0, sizeof(*gdb_ctx.params) * 
> max_num_params);
> +            gdb_ctx.params = params = g_new0(GdbCmdVariant, max_num_params);
>  
>              if (cmd_parse_params(&data[strlen(cmd->cmd)], cmd->schema,
>                                   gdb_ctx.params, &gdb_ctx.num_params)) {


-- 
Alex Bennée