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vla: enable sizeof operator for indirection 

This patch enables the sizeof operator for indirections:

1| void foo (size_t n) {
2|   int vla[n];
3|   int *vla_ptr = &vla;
4| }

(gdb) p sizeof(*vla_ptr)

yields sizeof (size_t) * n.

	* eval.c (evaluate_subexp_for_sizeof) <UNOP_IND>: Create an indirect
	value and retrieve the dynamic type size.
This commit is contained in:
Sanimir Agovic 2013-10-12 12:36:16 +01:00
parent 26cb189f8b
commit 04b19544ef
2 changed files with 7 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2014-04-11 Sanimir Agovic <sanimir.agovic@intel.com>
* eval.c (evaluate_subexp_for_sizeof) <UNOP_IND>: Create an indirect
value and retrieve the dynamic type size.
2014-04-11 Sanimir Agovic <sanimir.agovic@intel.com>
* eval.c (evaluate_subexp_for_sizeof) <OP_VAR_VALUE>: If the type

2
gdb/eval.c
View File

@ -3026,6 +3026,8 @@ evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
&& TYPE_CODE (type) != TYPE_CODE_ARRAY)
error (_("Attempt to take contents of a non-pointer value."));
type = check_typedef (TYPE_TARGET_TYPE (type));
if (is_dynamic_type (type))
type = value_type (value_ind (val));
return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
case UNOP_MEMVAL: