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Improve reference counting in py-type.c 

This improves the reference counting in py-type.c by using gdbpy_ref
and gdbpy_ref::new_reference in more places.

gdb/ChangeLog
2019-01-03  Tom Tromey  <tom@tromey.com>

	* python/py-type.c (convert_field): Use new_reference.  Return
	gdbpy_ref.
	(make_fielditem): Return gdbpy_ref.
	(typy_fields): Update.
	(typy_getitem): Update.
	(field_name): Return gdbpy_ref.  Use new_reference.
	(typy_iterator_iternext): Update.
This commit is contained in:
Tom Tromey 2018-12-27 12:08:09 -07:00
parent ea41325b7d
commit 1b20edf043
2 changed files with 33 additions and 32 deletions
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10
gdb/ChangeLog
View File

@ -1,3 +1,13 @@
2019-01-03 Tom Tromey <tom@tromey.com>
* python/py-type.c (convert_field): Use new_reference. Return
gdbpy_ref.
(make_fielditem): Return gdbpy_ref.
(typy_fields): Update.
(typy_getitem): Update.
(field_name): Return gdbpy_ref. Use new_reference.
(typy_iterator_iternext): Update.
2019-01-03 Tom Tromey <tom@tromey.com>
* python/py-record.c (gdbpy_stop_recording): Use Py_RETURN_NONE.

55
gdb/python/py-type.c
View File

@ -165,7 +165,7 @@ typy_get_code (PyObject *self, void *closure)
/* Helper function for typy_fields which converts a single field to a
gdb.Field object. Returns NULL on error. */
static PyObject *
static gdbpy_ref<>
convert_field (struct type *type, int field)
{
gdbpy_ref<> result (field_new ());
@ -218,23 +218,21 @@ convert_field (struct type *type, int field)
}
}
if (arg == NULL)
{
arg.reset (Py_None);
Py_INCREF (arg.get ());
}
arg = gdbpy_ref<>::new_reference (Py_None);
if (PyObject_SetAttrString (result.get (), "name", arg.get ()) < 0)
return NULL;
arg.reset (TYPE_FIELD_ARTIFICIAL (type, field) ? Py_True : Py_False);
Py_INCREF (arg.get ());
arg = gdbpy_ref<>::new_reference (TYPE_FIELD_ARTIFICIAL (type, field)
? Py_True : Py_False);
if (PyObject_SetAttrString (result.get (), "artificial", arg.get ()) < 0)
return NULL;
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
arg.reset (field < TYPE_N_BASECLASSES (type) ? Py_True : Py_False);
arg = gdbpy_ref<>::new_reference (field < TYPE_N_BASECLASSES (type)
? Py_True : Py_False);
else
arg.reset (Py_False);
Py_INCREF (arg.get ());
arg = gdbpy_ref<>::new_reference (Py_False);
if (PyObject_SetAttrString (result.get (), "is_base_class", arg.get ()) < 0)
return NULL;
@ -246,10 +244,7 @@ convert_field (struct type *type, int field)
/* A field can have a NULL type in some situations. */
if (TYPE_FIELD_TYPE (type, field) == NULL)
{
arg.reset (Py_None);
Py_INCREF (arg.get ());
}
arg = gdbpy_ref<>::new_reference (Py_None);
else
arg.reset (type_to_type_object (TYPE_FIELD_TYPE (type, field)));
if (arg == NULL)
@ -257,24 +252,22 @@ convert_field (struct type *type, int field)
if (PyObject_SetAttrString (result.get (), "type", arg.get ()) < 0)
return NULL;
return result.release ();
return result;
}
/* Helper function to return the name of a field, as a gdb.Field object.
If the field doesn't have a name, None is returned. */
static PyObject *
static gdbpy_ref<>
field_name (struct type *type, int field)
{
PyObject *result;
gdbpy_ref<> result;
if (TYPE_FIELD_NAME (type, field))
result = PyString_FromString (TYPE_FIELD_NAME (type, field));
result.reset (PyString_FromString (TYPE_FIELD_NAME (type, field)));
else
{
result = Py_None;
Py_INCREF (result);
}
result = gdbpy_ref<>::new_reference (Py_None);
return result;
}
@ -284,7 +277,7 @@ field_name (struct type *type, int field)
the field, or a tuple consisting of field name and gdb.Field
object. */
static PyObject *
static gdbpy_ref<>
make_fielditem (struct type *type, int i, enum gdbpy_iter_kind kind)
{
switch (kind)
@ -294,7 +287,7 @@ make_fielditem (struct type *type, int i, enum gdbpy_iter_kind kind)
gdbpy_ref<> key (field_name (type, i));
if (key == NULL)
return NULL;
gdbpy_ref<> value (convert_field (type, i));
gdbpy_ref<> value = convert_field (type, i);
if (value == NULL)
return NULL;
gdbpy_ref<> item (PyTuple_New (2));
@ -302,7 +295,7 @@ make_fielditem (struct type *type, int i, enum gdbpy_iter_kind kind)
return NULL;
PyTuple_SET_ITEM (item.get (), 0, key.release ());
PyTuple_SET_ITEM (item.get (), 1, value.release ());
return item.release ();
return item;
}
case iter_keys:
return field_name (type, i);
@ -371,7 +364,7 @@ typy_fields (PyObject *self, PyObject *args)
/* Array type. Handle this as a special case because the common
machinery wants struct or union or enum types. Build a list of
one entry which is the range for the array. */
gdbpy_ref<> r (convert_field (type, 0));
gdbpy_ref<> r = convert_field (type, 0);
if (r == NULL)
return NULL;
@ -1186,9 +1179,7 @@ typy_getitem (PyObject *self, PyObject *key)
const char *t_field_name = TYPE_FIELD_NAME (type, i);
if (t_field_name && (strcmp_iw (t_field_name, field.get ()) == 0))
{
return convert_field (type, i);
}
return convert_field (type, i).release ();
}
PyErr_SetObject (PyExc_KeyError, key);
return NULL;
@ -1325,14 +1316,14 @@ typy_iterator_iternext (PyObject *self)
{
typy_iterator_object *iter_obj = (typy_iterator_object *) self;
struct type *type = iter_obj->source->type;
PyObject *result;
if (iter_obj->field < TYPE_NFIELDS (type))
{
result = make_fielditem (type, iter_obj->field, iter_obj->kind);
gdbpy_ref<> result = make_fielditem (type, iter_obj->field,
iter_obj->kind);
if (result != NULL)
iter_obj->field++;
return result;
return result.release ();
}
return NULL;