Re: [PATCH 3/3] tdesc: handle arbitrary strings in tdesc_register_in_reggroup_p

[Simon Marchi <simon dot marchi at polymtl dot ca>]

Hi Stafford,

On 2017-06-08 00:15, Stafford Horne wrote:
> @@ -1081,17 +1080,13 @@ tdesc_remote_register_number (struct gdbarch
> *gdbarch, int regno)
>  }
>
>  /* Check whether REGNUM is a member of REGGROUP.  Registers from the
> -   target description may be classified as general, float, or vector.
> -   Unlike a gdbarch register_reggroup_p method, this function will
> -   return -1 if it does not know; the caller should handle registers
> -   with no specified group.
> -
> -   Arbitrary strings (other than "general", "float", and "vector")
> -   from the description are not used; they cause the register to be
> -   displayed in "info all-registers" but excluded from "info
> -   registers" et al.  The names of containing features are also not
> -   used.  This might be extended to display registers in some more
> -   useful groupings.
> +   target description may be classified as general, float, vector or 
> other
> +   register groups registerd with reggroup_add().  Unlike a gdbarch

s/registerd/registered/

> @@ -1231,6 +1209,27 @@ tdesc_use_registers (struct gdbarch *gdbarch,
>  	void **slot = htab_find_slot (reg_hash, reg, INSERT);
>
>  	*slot = reg;
> +	/* Add reggroup if its new.  */
> +	if (reg->group != NULL)
> +	  {
> +	    struct reggroup *group;
> +	    bool group_exists = false;
> +
> +	    for (group = reggroup_next (gdbarch, NULL);
> +		 group != NULL;
> +		 group = reggroup_next (gdbarch, group))
> +	      {
> +		if (strcmp (reg->group, reggroup_name (group)) == 0)
> +		  {
> +		    group_exists = true;
> +		    break;
> +		  }
> +	      }
> +
> +	    if (!group_exists)
> +	      reggroup_add (gdbarch, reggroup_new (reg->group,
> +						   USER_REGGROUP));

Is the memory allocated by reggroup_new ever freed?

Simon