[PATCH v4 06/13] vla: print "variable length" for unresolved dynamic bounds
Sanimir Agovic
sanimir.agovic@intel.com
Tue Dec 17 12:18:00 GMT 2013
1| void foo (size_t n) {
2| int vla[n];
3| }
Given the following expression
(gdb) ptype &vla
Gdb evaluates the expression with EVAL_AVOID_SIDE_EFFECTS and thus
does not resolve the bounds information and misinterprets the high
bound as a constant. The current output is:
type = int (*)[1289346]
this patch deals with this case and prints:
type = int (*)[variable length]
instead.
2013-08-30 Keven Boell <keven.boell@intel.com>
Sanimir Agovic <sanimir.agovic@intel.com>
* c-typeprint.c (c_type_print_varspec_suffix): Added
check for not yet resolved high bound. If unresolved, print
"variable length" string to the console instead of random
length.
Change-Id: Ic6a5fc08c8651ef18760bdacacc492ed44fe4af4
---
gdb/c-typeprint.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/gdb/c-typeprint.c b/gdb/c-typeprint.c
index 2757337..739d770 100644
--- a/gdb/c-typeprint.c
+++ b/gdb/c-typeprint.c
@@ -689,7 +689,11 @@ c_type_print_varspec_suffix (struct type *type,
fprintf_filtered (stream, (is_vector ?
" __attribute__ ((vector_size(" : "["));
- if (get_array_bounds (type, &low_bound, &high_bound))
+ /* Bounds are not yet resolved, print a bounds placeholder instead. */
+ if (TYPE_HIGH_BOUND_KIND (TYPE_INDEX_TYPE (type)) == PROP_LOCEXPR
+ || TYPE_HIGH_BOUND_KIND (TYPE_INDEX_TYPE (type)) == PROP_LOCLIST)
+ fprintf_filtered (stream, "variable length");
+ else if (get_array_bounds (type, &low_bound, &high_bound))
fprintf_filtered (stream, "%s",
plongest (high_bound - low_bound + 1));
fprintf_filtered (stream, (is_vector ? ")))" : "]"));
--
1.8.3.1
More information about the Gdb-patches
mailing list