Re: [PATCHv2 1/2] gdb: Split func_command into two parts.

[Pedro Alves <palves@redhat.com>]

On 05/08/2018 05:58 PM, Andrew Burgess wrote:
> The func_command function is used to emulate the dbx 'func' command.
> However, finding a stack frame based on function name might be a useful
> feature, and so the core of func_command is now split out into a
> separate function.
> 
> gdb/ChangeLog:
> 
>         * stack.c (select_and_print_frame): Delete.
>         (func_command): Most content moved into new function
>         find_frame_for_function, use new function, print result, add
>         function comment.
> 	(find_frame_for_function): New function, now returns a result.

This LGTM, with a couple minor nits.

>  /* Return the symbol-block in which the selected frame is executing.
>     Can return zero under various legitimate circumstances.
> @@ -2460,19 +2450,19 @@ struct function_bounds
>    CORE_ADDR low, high;
>  };
>  
> -static void
> -func_command (const char *arg, int from_tty)
> +static struct frame_info *
> +find_frame_for_function (const char *function_name)

There's a comment above the structure that is describing
what the func_command function did.  That needs to be
updated to describe what the new function does.

> +
> +/* Implements the dbx 'func' command.  */
> +
> +static void
> +func_command (const char *arg, int from_tty)
> +{
> +  struct frame_info *frame;
> +
> +  if (arg == NULL)
> +    return;
> +
> +  frame = find_frame_for_function (arg);

You can declare and initialize at the same time:

func_command (const char *arg, int from_tty)
{
  if (arg == NULL)
    return;

  frame_info *frame = find_frame_for_function (arg);

Thanks,
Pedro Alves