From 3c8452d46ac23d455c30438d0885a738e02b56e1 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. gdb/ChangeLog: * eval.c (evaluate_subexp_for_sizeof) : Create an indirect value and retrieve the dynamic type size. --- gdb/ChangeLog | 5 +++++ gdb/eval.c | 4 +++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 1755609..c7efe62 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,10 @@ 2014-04-14 Sanimir Agovic + * eval.c (evaluate_subexp_for_sizeof) : Create an indirect + value and retrieve the dynamic type size. + +2014-04-14 Sanimir Agovic + * eval.c (evaluate_subexp_for_sizeof) : If the type passed to sizeof is dynamic evaluate the argument to compute the length. diff --git a/gdb/eval.c b/gdb/eval.c index 85523cd..22392eb 100644 --- a/gdb/eval.c +++ b/gdb/eval.c @@ -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; -- 2.7.4