From 04b19544ef6a97b62b2cc4a3170b900e046ab185 Mon Sep 17 00:00:00 2001 From: Sanimir Agovic Date: Sat, 12 Oct 2013 12:36:16 +0100 Subject: [PATCH] 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) : Create an indirect value and retrieve the dynamic type size. --- gdb/ChangeLog | 5 +++++ gdb/eval.c | 2 ++ 2 files changed, 7 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index ebeb2ef3a5..1b989aec1d 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2014-04-11 Sanimir Agovic + + * eval.c (evaluate_subexp_for_sizeof) : Create an indirect + value and retrieve the dynamic type size. + 2014-04-11 Sanimir Agovic * eval.c (evaluate_subexp_for_sizeof) : If the type diff --git a/gdb/eval.c b/gdb/eval.c index 26454f60a2..1f4c8697e0 100644 --- a/gdb/eval.c +++ b/gdb/eval.c @@ -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: