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[v6,05/15] vla: enable sizeof operator for indirection

Message ID 1397133617-26681-6-git-send-email-sanimir.agovic@intel.com
State Committed
Headers show

Commit Message

Agovic, Sanimir April 10, 2014, 12:40 p.m. UTC
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.

2013-10-18  Sanimir Agovic  <sanimir.agovic@intel.com>
            Keven Boell  <keven.boell@intel.com>

	* eval.c (evaluate_subexp_for_sizeof) <UNOP_IND>: Create an indirect
	value and retrieve the dynamic type size.


Signed-off-by: Sanimir Agovic <sanimir.agovic@intel.com>
---
 gdb/eval.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox

Patch

diff --git a/gdb/eval.c b/gdb/eval.c
index a81e789..b3e45ca 100644
--- a/gdb/eval.c
+++ b/gdb/eval.c
@@ -3027,6 +3027,8 @@  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: