[PATCH v2] ctf-reader: Fix length in dynamic array definition

[Jose E. Marchesi]

> Defining an array type with dynamic length, node `subrange'
> in the abixml file doesn't write the accurate `length'
> property `infinite', instead `1' is written:
>     <subrange length='1' .../>
>
> So, member function `array_type_def::subrange_type::is_infinite'
> is set when `upper_bound' value is equal to `0'.
>
> 	* src/abg-ctf-reader.cc (process_ctf_array_type):
> 	set subrange_type::is_infinite when `upper_bound' value
> 	is equal to `0'.
>
> Signed-off-by: Guillermo E. Martinez <guillermo.e.martinez@oracle.com>

LGTM

> ---
>  src/abg-ctf-reader.cc | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/src/abg-ctf-reader.cc b/src/abg-ctf-reader.cc
> index c571d825..fbf6baef 100644
> --- a/src/abg-ctf-reader.cc
> +++ b/src/abg-ctf-reader.cc
> @@ -472,6 +472,7 @@ process_ctf_array_type(read_context *ctxt,
>  {
>    array_type_def_sptr result;
>    ctf_arinfo_t ctf_ainfo;
> +  bool is_infinite = false;
>  
>    /* First, get the information about the CTF array.  */
>    if (static_cast<ctf_id_t>(ctf_array_info(ctf_dictionary,
> @@ -507,6 +508,10 @@ process_ctf_array_type(read_context *ctxt,
>    lower_bound.set_unsigned(0); /* CTF supports C only.  */
>    upper_bound.set_unsigned(nelems > 0 ? nelems - 1 : 0U);
>  
> +  /* for VLAs number of array elements is 0 */
> +  if (upper_bound.get_unsigned_value() == 0)
> +    is_infinite = true;
> +
>    subrange.reset(new array_type_def::subrange_type(ctxt->ir_env,
>                                                     "",
>                                                     lower_bound,
> @@ -517,6 +522,7 @@ process_ctf_array_type(read_context *ctxt,
>    if (!subrange)
>      return result;
>  
> +  subrange->is_infinite(is_infinite);
>    add_decl_to_scope(subrange, tunit->get_global_scope());
>    canonicalize(subrange);
>    subranges.push_back(subrange);