Add support for Python 3.

* NEWS: Mention Python 3 support.
* varobj.c (value_get_print_value): Use
python_string_to_target_string.
* python/py-block.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
* python/py-breakpoint.c: Ditto.
* python/py-cmd.c:  Ditto.
* python/py-event.c: Ditto.
* python/py-event.h: Ditto.
* python/py-evtregistry.c: Ditto.
* python/py-finishbreakpoint.c: Ditto.
* python/py-frame.c: Ditto.
* python/py-function.c: Ditto.
* python/py-infthread.c: Ditto.
* python/py-lazy-string.c: Ditto.
* python/py-progspace.c: Ditto.
* /python/py-symbol.c: Ditto.
* python/py-evts.c:  (gdbpy_initialize_py_events): Add module
initialization for Python 3.
* python/py-inferior.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(infpy_read_memory): Return memoryview object if Python 3.
(infpy_write_memory): Use "s*" operand parsing code for Python 3.
(infpy_search_memory): Ditto.
(get_buffer): New function for Python 3.
* python/py-objfile.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(objfpy_dealloc): Use Py_TYPE to call tp_free.
* python/py-param.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(get_attr): Use PyUnicode_CompareWithASCIIString if Python 3.
(set_attr): Ditto.
* python/py-prettyprint.c (print_string_repr): use PyBytes methods
instead of PyString methods if Python 3.
(print_children): Skip push_dummy_python_frame call if Python 3.
* python/py-symtab.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(salpy_dealloc): Use Py_TYPE to call tp_free.
* python/py-type.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(field_dealloc): Use Py_TYPE to call tp_free.
(typy_dealloc): Ditto.
(type_object_as_number): Adjust struct initializations for
differences in layout for Python 2 vs. Python 3.
* python/py-utils.c (python_string_to_unicode): Omit non-Unicode
string case for Python 3.
(unicode_to_encoded_python_string): Shorten code (no functional
change).
(python_string_to_target_python_string): Comment that in Python 3
returned value is a Python "bytes" type.
(gdbpy_is_string): Omit non-Unicode string check in Python 3.
(gdb_py_object_from_longest): Omit non-long integer case in Python
3.
(gdb_py_object_from_ulongest): Ditto.
* python/py-value.c: Use PyVarObject_HEAD_INIT in initialization
of type objects.
(valpy_dealloc): Use Py_TYPE to call tp_free.
(valpy_int): Omit function if Python 3.
(convert_value_from_python): Use "%S" format (Python object as a
string) if Python 3.
(value_object_as_number): Adjust struct initializations for
differences in layout for Python 2 vs. Python 3.
* python/python-config.py: Adjust syntax for Python 3
compatibility.
Include "sys.abiflags" string as part of python library name, if
that attribute exists (Python 3).
* python/python-internal.h (IS_PY3): Define if Python 3.
(Py_TPFLAGS_HAVE_ITER, Py_TPFLAGS_CHECKTYPES): Define with
placeholder value if Python 3.
(PyInt_Check, PyInt_FromLong, PyInt_AsLong, PyString_FromString,
PyString_Decode, PyString_FromFormat, PyString_Check): Define as
analogous Python 3 API function if Python 3.
(PyVarObject_HEAD_INIT): Define if not already defined.
(Py_TYPE): Ditto.
* python/python.c (eval_python_command): Omit Py_FlushLine call if
Python 3.
Check return values of all Python API calls for error.
Supply dummy "python" and "python-interactive" commands if Python
initialization failed.
(_initialize_python): Convert argc to wchar_t** if Python 3.
Add module initialization for Python 3.
(finish_python_initialization): Pass wchar_t * argument to
PySys_SetPath if Python 3.
* python/lib/gdb/__init__.py: Define "reload" if Python 3.
(_GdbFile): New class for common output file behavior.
(GdbOutFile): Subclass from _GdbFile.
(GdbOutputErrorFile): Ditto.
(auto_load_packages): Adjust syntax for Python 3 compatibility.
* python/lib/gdb/printing.py: Define basestr and int if Python 3.
* python/lib/gdb/prompt.py: Use sorted() function rather than
sort() method.
* python/lib/gdb/command/explore.py: Define raw_input if Python 3.
Adjust syntax for Python 3 compatibility.
* python/lib/gdb/command/pretty_printers.py: Use sorted() function
rather than sort() method.
Adjust syntax for Python 3 compatibility.
* python/lib/gdb/command/type_printers.py: Ditto.
* doc/gdb.texinfo (Inferior.read_memory): Mention that the return
value is a memoryview object if Python 3.

gdb/python/py-value.c

@@ -106,7 +106,7 @@ valpy_dealloc (PyObject *obj)
 
   Py_XDECREF (self->dynamic_type);
 
-  self->ob_type->tp_free (self);
+  Py_TYPE (self)->tp_free (self);
 }
 
 /* Helper to push a Value object on the global list.  */
@@ -1140,6 +1140,7 @@ is_intlike (struct type *type, int ptr_ok)
 	  || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR));
 }
 
+#ifndef IS_PY3K
 /* Implements conversion to int.  */
 static PyObject *
 valpy_int (PyObject *self)
@@ -1161,6 +1162,7 @@ valpy_int (PyObject *self)
 
   return gdb_py_object_from_longest (l);
 }
+#endif
 
 /* Implements conversion to long.  */
 static PyObject *
@@ -1335,9 +1337,14 @@ convert_value_from_python (PyObject *obj)
 	  value = value_copy (((value_object *) result)->value);
 	}
       else
+#ifdef IS_PY3K
+	PyErr_Format (PyExc_TypeError,
+		      _("Could not convert Python object: %S."), obj);
+#else
 	PyErr_Format (PyExc_TypeError,
 		      _("Could not convert Python object: %s."),
 		      PyString_AsString (PyObject_Str (obj)));
+#endif
     }
   if (except.reason < 0)
     {
@@ -1439,7 +1446,9 @@ static PyNumberMethods value_object_as_number = {
   valpy_add,
   valpy_subtract,
   valpy_multiply,
+#ifndef IS_PY3K
   valpy_divide,
+#endif
   valpy_remainder,
   NULL,			      /* nb_divmod */
   valpy_power,		      /* nb_power */
@@ -1453,12 +1462,31 @@ static PyNumberMethods value_object_as_number = {
   valpy_and,		      /* nb_and */
   valpy_xor,		      /* nb_xor */
   valpy_or,		      /* nb_or */
+#ifdef IS_PY3K
+  valpy_long,		      /* nb_int */
+  NULL,			      /* reserved */
+#else
   NULL,			      /* nb_coerce */
   valpy_int,		      /* nb_int */
   valpy_long,		      /* nb_long */
+#endif
   valpy_float,		      /* nb_float */
+#ifndef IS_PY3K
   NULL,			      /* nb_oct */
-  NULL			      /* nb_hex */
+  NULL,                       /* nb_hex */
+#endif
+  NULL,                       /* nb_inplace_add */
+  NULL,                       /* nb_inplace_subtract */
+  NULL,                       /* nb_inplace_multiply */
+  NULL,                       /* nb_inplace_remainder */
+  NULL,                       /* nb_inplace_power */
+  NULL,                       /* nb_inplace_lshift */
+  NULL,                       /* nb_inplace_rshift */
+  NULL,                       /* nb_inplace_and */
+  NULL,                       /* nb_inplace_xor */
+  NULL,                       /* nb_inplace_or */
+  NULL,                       /* nb_floor_divide */
+  valpy_divide                /* nb_true_divide */
 };
 
 static PyMappingMethods value_object_as_mapping = {
@@ -1468,8 +1496,7 @@ static PyMappingMethods value_object_as_mapping = {
 };
 
 PyTypeObject value_object_type = {
-  PyObject_HEAD_INIT (NULL)
-  0,				  /*ob_size*/
+  PyVarObject_HEAD_INIT (NULL, 0)
   "gdb.Value",			  /*tp_name*/
   sizeof (value_object),	  /*tp_basicsize*/
   0,				  /*tp_itemsize*/