[gdb/ada] Extend type equivalence test in ada_resolve_enum
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Commit Message
When running test-case gdb.ada/local-enum.exp with target board debug-types, I
run into:
...
(gdb) print v1(three)^M
No name 'three' in enumeration type 'local__e1'^M
(gdb) FAIL: gdb.ada/local-enum.exp: print v1 element
...
The array V1 is of type A1 which is an array with index type E1, containing
"three" as enumerator:
...
type E1 is (one, two, three);
type A1 is array (E1) of Integer;
V1 : A1 := (0, 1, 2);
...
There's also a type E2 that contains three as enumerator:
...
type E2 is (three, four, five);
...
When doing "print v1(three)", it's the job of ada_resolve_enum to resolve
"three" to type E1 rather than type E2.
When using target board debug-types, the enums E1 and E2 are replicated in the
.debug_types section, and consequently in ada_resolve_enum the type
equivalence check using a pointer comparison fails:
...
for (int i = 0; i < syms.size (); ++i)
{
/* We already know the name matches, so we're just looking for
an element of the correct enum type. */
if (ada_check_typedef (syms[i].symbol->type ()) == context_type)
return i;
}
...
Fix this by also trying a structural comparison using
ada_identical_enum_types_p.
Tested on x86_64-linux.
PR ada/29335
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29335
---
gdb/ada-lang.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
base-commit: 4d944db22c351296bad0b54d6a1857ad1fbde575
Comments
>>>>> "Tom" == Tom de Vries via Gdb-patches <gdb-patches@sourceware.org> writes:
Tom> When using target board debug-types, the enums E1 and E2 are replicated in the
Tom> .debug_types section, and consequently in ada_resolve_enum the type
Tom> equivalence check using a pointer comparison fails:
Tom> ...
Tom> for (int i = 0; i < syms.size (); ++i)
Tom> {
Tom> /* We already know the name matches, so we're just looking for
Tom> an element of the correct enum type. */
Tom> if (ada_check_typedef (syms[i].symbol->type ()) == context_type)
Tom> return i;
Tom> }
Tom> ...
Tom> Fix this by also trying a structural comparison using
Tom> ada_identical_enum_types_p.
Thank you. I think this is ok.
Approved-By: Tom Tromey <tom@tromey.com>
Tom
@@ -202,6 +202,7 @@ static struct type *ada_find_any_type (const char *name);
static symbol_name_matcher_ftype *ada_get_symbol_name_matcher
(const lookup_name_info &lookup_name);
+static int ada_identical_enum_types_p (struct type *type1, struct type *type2);
/* The character set used for source files. */
@@ -3799,11 +3800,24 @@ ada_resolve_enum (std::vector<struct block_symbol> &syms,
gdb_assert (context_type->code () == TYPE_CODE_ENUM);
context_type = ada_check_typedef (context_type);
+ /* We already know the name matches, so we're just looking for
+ an element of the correct enum type. */
+ struct type *type1 = context_type;
for (int i = 0; i < syms.size (); ++i)
{
- /* We already know the name matches, so we're just looking for
- an element of the correct enum type. */
- if (ada_check_typedef (syms[i].symbol->type ()) == context_type)
+ struct type *type2 = ada_check_typedef (syms[i].symbol->type ());
+ if (type1 == type2)
+ return i;
+ }
+
+ for (int i = 0; i < syms.size (); ++i)
+ {
+ struct type *type2 = ada_check_typedef (syms[i].symbol->type ());
+ if (type1->num_fields () != type2->num_fields ())
+ continue;
+ if (strcmp (type1->name (), type2->name ()) != 0)
+ continue;
+ if (ada_identical_enum_types_p (type1, type2))
return i;
}