[SCM] archer-swagiaal-oguz: cleanups in copy_py_list

[tromey@sourceware.org]

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- Log -----------------------------------------------------------------
commit 7508a202caa1d05f6ebb0df3c359f27f7ff2ce14
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Dec 15 09:33:25 2010 -0700

    cleanups in copy_py_list

commit f9d1f4aa50e70b9ef16ea9a3596cb2758b2516fb
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Dec 15 09:32:12 2010 -0700

    fix for gdbpy_selected_thread from master

commit b1bc690c3e0ab48e62c6d6617358f0cdcc1b234d
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Dec 15 09:31:26 2010 -0700

    fix for find_thread_object from master

commit 68a784af97eec629ccdf59fd7020e3141b4ce736
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Dec 15 09:22:20 2010 -0700

    clean up evpy_emit_event

-----------------------------------------------------------------------

Summary of changes:
 gdb/python/py-event.c     |   31 +++++++++++++++++++++++--------
 gdb/python/py-inferior.c  |    3 +++
 gdb/python/py-infthread.c |    7 -------
 gdb/python/python.c       |   11 ++++++++---
 4 files changed, 34 insertions(+), 18 deletions(-)

First 500 lines of diff:
diff --git a/gdb/python/py-event.c b/gdb/python/py-event.c
index 65ac3f5..2c84be9 100644
--- a/gdb/python/py-event.c
+++ b/gdb/python/py-event.c
@@ -124,9 +124,8 @@ gdbpy_initialize_event (void)
 void
 evpy_emit_event (event_object *event)
 {
-  PyObject *callback_list;
-  PyObject *callback_list_copy;
-  PyObject *args_tuple;
+  PyObject *callback_list, *event_obj = (PyObject *) event;
+  PyObject *callback_list_copy = NULL;
   Py_ssize_t i;
 
   callback_list = (PyObject *) (event->registry->callbacks);
@@ -137,15 +136,31 @@ evpy_emit_event (event_object *event)
      a notification.  */
   callback_list_copy = copy_py_list (callback_list);
   if (!callback_list_copy)
-    error(_("Cannot copy callback list."));
-
-  args_tuple = PyTuple_New ((Py_ssize_t) 1);
-  PyTuple_SetItem (args_tuple, (Py_ssize_t) 0, (PyObject *) event);
+    goto fail;
 
   for (i = 0; i < PyList_Size (callback_list_copy); i++)
     {
-      PyObject_CallObject (PyList_GET_ITEM (callback_list_copy, i), args_tuple);
+      PyObject *func = PyList_GetItem (callback_list_copy, i);
+
+      if (func == NULL)
+	goto fail;
+
+      if (!PyObject_CallFunctionObjArgs (func, event_obj, NULL))
+	{
+	  /* Print the trace here, but keep going -- we want to try to
+	     call all of the callbacks even if one is broken.  */
+	  gdbpy_print_stack ();
+	}
     }
+
+  Py_XDECREF (callback_list_copy);
+  Py_XDECREF (event_obj);
+  return;
+
+ fail:
+  gdbpy_print_stack ();
+  Py_XDECREF (callback_list_copy);
+  Py_XDECREF (event_obj);
 }
 
 static PyGetSetDef event_object_getset[] =
diff --git a/gdb/python/py-inferior.c b/gdb/python/py-inferior.c
index c277335..e14b5da 100644
--- a/gdb/python/py-inferior.c
+++ b/gdb/python/py-inferior.c
@@ -206,6 +206,9 @@ find_thread_object (ptid_t ptid)
   PyObject *inf_obj;
 
   pid = PIDGET (ptid);
+  if (pid == 0)
+    return NULL;
+
   inf_obj = find_inferior_object (pid);
 
   if (inf_obj)
diff --git a/gdb/python/py-infthread.c b/gdb/python/py-infthread.c
index 64f0a21..3e76519 100644
--- a/gdb/python/py-infthread.c
+++ b/gdb/python/py-infthread.c
@@ -173,13 +173,6 @@ gdbpy_selected_thread (PyObject *self, PyObject *args)
 {
   PyObject *thread_obj;
 
-  if (inferior_ptid.pid == 0)
-    {
-      PyErr_SetString (PyExc_RuntimeError,
-                       _("No thread is currently selected."));
-      return NULL;
-    }
-
   thread_obj = (PyObject *) find_thread_object (inferior_ptid);
   if (thread_obj)
     {
diff --git a/gdb/python/python.c b/gdb/python/python.c
index 7c686d3..6f13a1e 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -163,10 +163,11 @@ compute_python_string (struct command_line *l)
 }
 
 /* Returns a a copy of the give LIST.
-   Creates a new reference which must be handeld by the caller.  */
+   Creates a new reference which must be handled by the caller.  */
 
 PyObject *
-copy_py_list (PyObject *list){
+copy_py_list (PyObject *list)
+{
   int i;
 
   PyObject *new_list = PyList_New (0);
@@ -174,7 +175,11 @@ copy_py_list (PyObject *list){
     return NULL;
 
   for (i = 0; i < PyList_Size (list); i++)
-    PyList_Append (new_list, PyList_GET_ITEM (list, i));
+    if (PyList_Append (new_list, PyList_GET_ITEM (list, i)) < 0)
+      {
+	Py_DECREF (new_list);
+	return NULL;
+      }
 
   return new_list;
 }


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