Use gdbpy_ref in py-cmd.c
This changes py-cmd.c to use gdbpy_ref in more places. This also fixes a latent memory leak in cmdpy_completer_helper, which unnecessarily increfs the result of PyObject_CallMethodObjArgs. This is not needed because that function returns a new reference. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-cmd.c (cmdpy_completer_helper): Use gdbpy_ref. Remove extra incref. (cmdpy_completer_handle_brkchars, cmdpy_completer, cmdpy_init): Use gdbpy_ref.
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@ -1,3 +1,10 @@
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2017-01-10 Tom Tromey <tom@tromey.com>
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* python/py-cmd.c (cmdpy_completer_helper): Use gdbpy_ref. Remove
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extra incref.
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(cmdpy_completer_handle_brkchars, cmdpy_completer, cmdpy_init):
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Use gdbpy_ref.
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2017-01-10 Tom Tromey <tom@tromey.com>
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* python/py-breakpoint.c (gdbpy_breakpoint_cond_says_stop): Use
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@ -232,8 +232,6 @@ cmdpy_completer_helper (struct cmd_list_element *command,
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const char *text, const char *word)
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{
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cmdpy_object *obj = (cmdpy_object *) get_cmd_context (command);
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PyObject *textobj, *wordobj;
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PyObject *resultobj;
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if (obj == NULL)
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error (_("Invalid invocation of Python command object."));
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@ -243,29 +241,26 @@ cmdpy_completer_helper (struct cmd_list_element *command,
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return NULL;
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}
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textobj = PyUnicode_Decode (text, strlen (text), host_charset (), NULL);
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gdbpy_ref textobj (PyUnicode_Decode (text, strlen (text), host_charset (),
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NULL));
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if (textobj == NULL)
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error (_("Could not convert argument to Python string."));
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wordobj = PyUnicode_Decode (word, strlen (word), host_charset (), NULL);
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gdbpy_ref wordobj (PyUnicode_Decode (word, strlen (word), host_charset (),
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NULL));
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if (wordobj == NULL)
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{
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Py_DECREF (textobj);
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error (_("Could not convert argument to Python string."));
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}
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resultobj = PyObject_CallMethodObjArgs ((PyObject *) obj, complete_cst,
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textobj, wordobj, NULL);
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Py_DECREF (textobj);
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Py_DECREF (wordobj);
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if (!resultobj)
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gdbpy_ref resultobj (PyObject_CallMethodObjArgs ((PyObject *) obj,
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complete_cst,
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textobj.get (),
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wordobj.get (), NULL));
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if (resultobj == NULL)
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{
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/* Just swallow errors here. */
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PyErr_Clear ();
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}
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Py_XINCREF (resultobj);
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return resultobj;
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return resultobj.release ();
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}
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/* Python function called to determine the break characters of a
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@ -277,26 +272,24 @@ static void
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cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
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const char *text, const char *word)
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{
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PyObject *resultobj = NULL;
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gdbpy_enter enter_py (get_current_arch (), current_language);
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/* Calling our helper to obtain the PyObject of the Python
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function. */
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resultobj = cmdpy_completer_helper (command, text, word);
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gdbpy_ref resultobj (cmdpy_completer_helper (command, text, word));
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/* Check if there was an error. */
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if (resultobj == NULL)
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goto done;
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return;
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if (PyInt_Check (resultobj))
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if (PyInt_Check (resultobj.get ()))
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{
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/* User code may also return one of the completion constants,
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thus requesting that sort of completion. We are only
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interested in this kind of return. */
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long value;
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if (!gdb_py_int_as_long (resultobj, &value))
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if (!gdb_py_int_as_long (resultobj.get (), &value))
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{
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/* Ignore. */
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PyErr_Clear ();
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@ -310,10 +303,6 @@ cmdpy_completer_handle_brkchars (struct cmd_list_element *command,
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(completers[value].completer);
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}
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}
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done:
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Py_XDECREF (resultobj);
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}
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/* Called by gdb for command completion. */
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@ -322,29 +311,28 @@ static VEC (char_ptr) *
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cmdpy_completer (struct cmd_list_element *command,
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const char *text, const char *word)
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{
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PyObject *resultobj = NULL;
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VEC (char_ptr) *result = NULL;
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gdbpy_enter enter_py (get_current_arch (), current_language);
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/* Calling our helper to obtain the PyObject of the Python
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function. */
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resultobj = cmdpy_completer_helper (command, text, word);
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gdbpy_ref resultobj (cmdpy_completer_helper (command, text, word));
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/* If the result object of calling the Python function is NULL, it
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means that there was an error. In this case, just give up and
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return NULL. */
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if (resultobj == NULL)
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goto done;
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return NULL;
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result = NULL;
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if (PyInt_Check (resultobj))
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if (PyInt_Check (resultobj.get ()))
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{
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/* User code may also return one of the completion constants,
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thus requesting that sort of completion. */
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long value;
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if (! gdb_py_int_as_long (resultobj, &value))
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if (! gdb_py_int_as_long (resultobj.get (), &value))
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{
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/* Ignore. */
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PyErr_Clear ();
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@ -354,24 +342,24 @@ cmdpy_completer (struct cmd_list_element *command,
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}
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else
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{
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PyObject *iter = PyObject_GetIter (resultobj);
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PyObject *elt;
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gdbpy_ref iter (PyObject_GetIter (resultobj.get ()));
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if (iter == NULL)
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goto done;
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return NULL;
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while ((elt = PyIter_Next (iter)) != NULL)
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while (true)
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{
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gdbpy_ref elt (PyIter_Next (iter.get ()));
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if (elt == NULL)
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break;
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if (! gdbpy_is_string (elt))
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if (! gdbpy_is_string (elt.get ()))
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{
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/* Skip problem elements. */
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Py_DECREF (elt);
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continue;
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}
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gdb::unique_xmalloc_ptr<char>
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item (python_string_to_host_string (elt));
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Py_DECREF (elt);
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item (python_string_to_host_string (elt.get ()));
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if (item == NULL)
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{
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/* Skip problem elements. */
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@ -381,18 +369,12 @@ cmdpy_completer (struct cmd_list_element *command,
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VEC_safe_push (char_ptr, result, item.release ());
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}
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Py_DECREF (iter);
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/* If we got some results, ignore problems. Otherwise, report
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the problem. */
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if (result != NULL && PyErr_Occurred ())
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PyErr_Clear ();
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}
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done:
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Py_XDECREF (resultobj);
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return result;
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}
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@ -587,21 +569,18 @@ cmdpy_init (PyObject *self, PyObject *args, PyObject *kw)
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}
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if (PyObject_HasAttr (self, gdbpy_doc_cst))
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{
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PyObject *ds_obj = PyObject_GetAttr (self, gdbpy_doc_cst);
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gdbpy_ref ds_obj (PyObject_GetAttr (self, gdbpy_doc_cst));
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if (ds_obj && gdbpy_is_string (ds_obj))
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if (ds_obj != NULL && gdbpy_is_string (ds_obj.get ()))
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{
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docstring = python_string_to_host_string (ds_obj).release ();
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docstring = python_string_to_host_string (ds_obj.get ()).release ();
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if (docstring == NULL)
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{
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xfree (cmd_name);
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xfree (pfx_name);
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Py_DECREF (ds_obj);
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return -1;
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}
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}
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Py_XDECREF (ds_obj);
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}
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if (! docstring)
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docstring = xstrdup (_("This command is not documented."));
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