[PATCH 08/10] Return gdbpy_ref<> from symtab_to_linetable_object

[Tom Tromey <tromey@adacore.com>]

This changes symtab_to_linetable_object to return a gdbpy_ref<>,
using the type system to convey that a new reference is always
returned.
---
 gdb/python/py-linetable.c    | 4 ++--
 gdb/python/py-symtab.c       | 2 +-
 gdb/python/python-internal.h | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/gdb/python/py-linetable.c b/gdb/python/py-linetable.c
index 384ced68a32..2afa9b033e7 100644
--- a/gdb/python/py-linetable.c
+++ b/gdb/python/py-linetable.c
@@ -77,7 +77,7 @@ get_symtab (PyObject *linetable)
 /* Helper function to create a line table object that wraps a
    gdb.Symtab object.  */
 
-PyObject *
+gdbpy_ref<>
 symtab_to_linetable_object (PyObject *symtab)
 {
   linetable_object *ltable;
@@ -88,7 +88,7 @@ symtab_to_linetable_object (PyObject *symtab)
       ltable->symtab = symtab;
       Py_INCREF (symtab);
     }
-  return (PyObject *) ltable;
+  return gdbpy_ref<> (ltable);
 }
 
 /* Internal helper function to build a line table object from a line
diff --git a/gdb/python/py-symtab.c b/gdb/python/py-symtab.c
index 550f287a6ee..ed5abac1372 100644
--- a/gdb/python/py-symtab.c
+++ b/gdb/python/py-symtab.c
@@ -220,7 +220,7 @@ stpy_get_linetable (PyObject *self, PyObject *args)
 
   STPY_REQUIRE_VALID (self, symtab);
 
-  return symtab_to_linetable_object (self);
+  return symtab_to_linetable_object (self).release ();
 }
 
 static PyObject *
diff --git a/gdb/python/python-internal.h b/gdb/python/python-internal.h
index 0b816db196f..85f7f1f4dd1 100644
--- a/gdb/python/python-internal.h
+++ b/gdb/python/python-internal.h
@@ -503,7 +503,7 @@ gdbpy_ref<> block_to_block_object (const struct block *block,
 gdbpy_ref<> value_to_value_object (struct value *v);
 gdbpy_ref<> type_to_type_object (struct type *);
 gdbpy_ref<> frame_info_to_frame_object (const frame_info_ptr &frame);
-PyObject *symtab_to_linetable_object (PyObject *symtab);
+gdbpy_ref<> symtab_to_linetable_object (PyObject *symtab);
 gdbpy_ref<> pspace_to_pspace_object (struct program_space *);
 PyObject *pspy_get_printers (PyObject *, void *);
 PyObject *pspy_get_frame_filters (PyObject *, void *);

-- 
2.53.0