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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.

gdb/ChangeLog:

	* 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 committed by Joel Brobecker
parent 4ad88275f8
commit 3c8452d46a
2 changed files with 8 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2014-04-14 Sanimir Agovic <sanimir.agovic@intel.com>
* eval.c (evaluate_subexp_for_sizeof) <UNOP_IND>: Create an indirect
value and retrieve the dynamic type size.
2014-04-14 Sanimir Agovic <sanimir.agovic@intel.com>
* eval.c (evaluate_subexp_for_sizeof) <OP_VAR_VALUE>: If the type

4
gdb/eval.c
View File

@ -3026,7 +3026,9 @@ 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 = TYPE_TARGET_TYPE (type);
break;
if (is_dynamic_type (type))
type = value_type (value_ind (val));
return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
case UNOP_MEMVAL:
(*pos) += 3;