Rename internal Python functions to start with an underscore

I could not tell if GdbSetPythonDirectory is internal or not because
I could not find any references to it, so I left it as-is.

Tested by running the testsuite on gdb.python/*.exp; everything still
passes.

2019-08-15  Christian Biesinger  <cbiesinger@google.com>

	* python/lib/gdb/__init__.py (GdbOutputFile): Rename to have a
	leading underscore.
	(GdbOutputErrorFile): Likewise.
	(global scope): Adjust constructor calls to GdbOutput{,Error}File
	accordingly.
	(execute_unwinders): Rename to have a leading underscore.
	(auto_load_packages): Likewise.
	(global scope): Adjust call to auto_load_packages accordingly.
	(GdbSetPythonDirectory): Likewise.
	* python/py-unwind.c (pyuw_sniffer): Call _execute_unwinders
	instead of execute_unwinders.

gdb/testsuite/ChangeLog:

2019-08-15  Christian Biesinger  <cbiesinger@google.com>

	* gdb.python/python.exp: Expect a leading underscore on
	GdbOutput{,Error}File.

gdb/ChangeLog

@@ -1,3 +1,17 @@
+2019-08-15  Christian Biesinger  <cbiesinger@google.com>
+
+	* python/lib/gdb/__init__.py (GdbOutputFile): Rename to have a
+	leading underscore.
+	(GdbOutputErrorFile): Likewise.
+	(global scope): Adjust constructor calls to GdbOutput{,Error}File
+	accordingly.
+	(execute_unwinders): Rename to have a leading underscore.
+	(auto_load_packages): Likewise.
+	(global scope): Adjust call to auto_load_packages accordingly.
+	(GdbSetPythonDirectory): Likewise.
+	* python/py-unwind.c (pyuw_sniffer): Call _execute_unwinders
+	instead of execute_unwinders.
+
 2019-08-15  Tom Tromey  <tom@tromey.com>
 
 	* tui/tui-layout.c (show_layout, show_source_disasm_command)

gdb/python/lib/gdb/__init__.py

@@ -43,17 +43,17 @@ class _GdbFile (object):
     def flush(self):
         flush()
 
-class GdbOutputFile (_GdbFile):
+class _GdbOutputFile (_GdbFile):
     def write(self, s):
         write(s, stream=STDOUT)
 
-sys.stdout = GdbOutputFile()
+sys.stdout = _GdbOutputFile()
 
-class GdbOutputErrorFile (_GdbFile):
+class _GdbOutputErrorFile (_GdbFile):
     def write(self, s):
         write(s, stream=STDERR)
 
-sys.stderr = GdbOutputErrorFile()
+sys.stderr = _GdbOutputErrorFile()
 
 # Default prompt hook does nothing.
 prompt_hook = None
@@ -74,7 +74,7 @@ frame_filters = {}
 # Initial frame unwinders.
 frame_unwinders = []
 
-def execute_unwinders(pending_frame):
+def _execute_unwinders(pending_frame):
     """Internal function called from GDB to execute all unwinders.
 
     Runs each currently enabled unwinder until it finds the one that
@@ -124,7 +124,7 @@ packages = [
 # manually iterate the list, collating the Python files in each module
 # path.  Construct the module name, and import.
 
-def auto_load_packages():
+def _auto_load_packages():
     for package in packages:
         location = os.path.join(os.path.dirname(__file__), package)
         if os.path.exists(location):
@@ -144,7 +144,7 @@ def auto_load_packages():
                 except:
                     sys.stderr.write (traceback.format_exc() + "\n")
 
-auto_load_packages()
+_auto_load_packages()
 
 def GdbSetPythonDirectory(dir):
     """Update sys.path, reload gdb and auto-load packages."""
@@ -161,7 +161,7 @@ def GdbSetPythonDirectory(dir):
     # note that reload overwrites the gdb module without deleting existing
     # attributes
     reload(__import__(__name__))
-    auto_load_packages()
+    _auto_load_packages()
 
 def current_progspace():
     "Return the current Progspace."

gdb/python/py-unwind.c

@@ -507,16 +507,16 @@ pyuw_sniffer (const struct frame_unwind *self, struct frame_info *this_frame,
 
   /* Run unwinders.  */
   if (gdb_python_module == NULL
-      || ! PyObject_HasAttrString (gdb_python_module, "execute_unwinders"))
+      || ! PyObject_HasAttrString (gdb_python_module, "_execute_unwinders"))
     {
       PyErr_SetString (PyExc_NameError,
-                       "Installation error: gdb.execute_unwinders function "
+                       "Installation error: gdb._execute_unwinders function "
                        "is missing");
       gdbpy_print_stack ();
       return 0;
     }
   gdbpy_ref<> pyo_execute (PyObject_GetAttrString (gdb_python_module,
-						   "execute_unwinders"));
+						   "_execute_unwinders"));
   if (pyo_execute == NULL)
     {
       gdbpy_print_stack ();

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2019-08-15  Christian Biesinger  <cbiesinger@google.com>
+
+	* gdb.python/python.exp: Expect a leading underscore on
+	GdbOutput{,Error}File.
+
 2019-08-15  Sandra Loosemore  <sandra@codesourcery.com>
 
 	* gdb.dwarf2/dw2-dir-file-name.exp: Skip on remote or

gdb/testsuite/gdb.python/python.exp

@@ -288,8 +288,8 @@ gdb_test "python print (symtab\[1\]\[0\].symtab)" "None" "test decode_line *0 fi
 gdb_test "python print (symtab\[1\]\[0\].pc)" "0" "test decode_line *0 pc"
 
 # gdb.write
-gdb_test "python print (sys.stderr)" ".*gdb.GdbOutputErrorFile (instance|object) at.*" "test stderr location"
-gdb_test "python print (sys.stdout)" ".*gdb.GdbOutputFile (instance|object) at.*" "test stdout location"
+gdb_test "python print (sys.stderr)" ".*gdb._GdbOutputErrorFile (instance|object) at.*" "test stderr location"
+gdb_test "python print (sys.stdout)" ".*gdb._GdbOutputFile (instance|object) at.*" "test stdout location"
 gdb_test "python gdb.write(\"Foo\\n\")" "Foo" "test default write"
 gdb_test "python gdb.write(\"Error stream\\n\", stream=gdb.STDERR)" "Error stream" "test stderr write"
 gdb_test "python gdb.write(\"Normal stream\\n\", stream=gdb.STDOUT)" "Normal stream" "test stdout write"