[rfa] add_symbol_file_command, avoid memory leak.

[Jan Kratochvil]

On Sun, 27 Feb 2011 02:38:04 +0100, Michael Snyder wrote:
> This looks straightforward, but I'd appreciate review.
> I don't really understand why sect_opts never gets freed?

It is a bug, sect_opts should be freed.  It is last time used by the lines:
      char *val = sect_opts[i].value;
      char *sec = sect_opts[i].name;

The strings in sect_opts[i].name are last time used there by:
  symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
                   section_addrs, flags);

This is also the reason why the NAMEs do not have strdup() and they get safely
freed through make_cleanup_freeargv there.


> --- symfile.c	26 Feb 2011 02:07:09 -0000	1.307
> +++ symfile.c	27 Feb 2011 01:35:32 -0000
> @@ -2169,15 +2169,15 @@ add_symbol_file_command (char *args, int
>    size_t num_sect_opts = 0;
>    struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
>  
> +  if (args == NULL)
> +    error (_("add-symbol-file takes a file name and an address"));
> +
>    num_sect_opts = 16;
>    sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
>  					   * sizeof (struct sect_opt));
>  
>    dont_repeat ();
>  
> -  if (args == NULL)
> -    error (_("add-symbol-file takes a file name and an address"));
> -
>    argv = gdb_buildargv (args);
>    make_cleanup_freeargv (argv);
>  

While a nitpick it is a regression, that dont_repeat should be called even in
the case of that error.


Thanks,
Jan