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[PATCH v6 05/15] vla: enable sizeof operator for indirection
- From: Sanimir Agovic <sanimir dot agovic at intel dot com>
- To: brobecker at adacore dot com
- Cc: gdb-patches at sourceware dot org, tromey at redhat dot com
- Date: Thu, 10 Apr 2014 14:40:07 +0200
- Subject: [PATCH v6 05/15] vla: enable sizeof operator for indirection
- Authentication-results: sourceware.org; auth=none
- References: <1397133617-26681-1-git-send-email-sanimir dot agovic at intel dot com>
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 --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:
--
1.8.4.2