gdb/python: remove Python 2 support

New in this version:

 - Add a PY_MAJOR_VERSION check in configure.ac / AC_TRY_LIBPYTHON.  If
   the user passes --with-python=python2, this will cause a configure
   failure saying that GDB only supports Python 3.

Support for Python 2 is a maintenance burden for any patches touching
Python support.  Among others, the differences between Python 2 and 3
string and integer types are subtle.  It requires a lot of effort and
thinking to get something that behaves correctly on both.  And that's if
the author and reviewer of the patch even remember to test with Python
2.

See this thread for an example:

  https://sourceware.org/pipermail/gdb-patches/2021-December/184260.html

So, remove Python 2 support.  Update the documentation to state that GDB
can be built against Python 3 (as opposed to Python 2 or 3).

Update all the spots that use:

 - sys.version_info
 - IS_PY3K
 - PY_MAJOR_VERSION
 - gdb_py_is_py3k

... to only keep the Python 3 portions and drop the use of some
now-removed compatibility macros.

I did not update the configure script more than just removing the
explicit references to Python 2.  We could maybe do more there, like
check the Python version and reject it if that version is not
supported.  Otherwise (with this patch), things will only fail at
compile time, so it won't really be clear to the user that they are
trying to use an unsupported Python version.  But I'm a bit lost in the
configure code that checks for Python, so I kept that for later.

Change-Id: I75b0f79c148afbe3c07ac664cfa9cade052c0c62

gdb/NEWS

@@ -5,6 +5,9 @@
 
 * GDB now supports hardware watchpoints on FreeBSD/Aarch64.
 
+* Remove support for building against Python 2, it is now only possible to
+  build GDB against Python 3.
+
 * Python API
 
   ** New function gdb.format_address(ADDRESS, PROGSPACE, ARCHITECTURE),

gdb/README

@@ -506,7 +506,7 @@ more obscure GDB `configure' options are not listed here.
      GDB scripting much more powerful than the restricted CLI
      scripting language.  If your host does not have Python installed,
      you can find it on `http://www.python.org/download/'.  The oldest
-     version of Python supported by GDB is 2.6.  The optional argument
+     version of Python supported by GDB is 3.2.  The optional argument
      PYTHON is used to find the Python headers and libraries.  It can
      be either the name of a Python executable, or the name of the
      directory in which Python is installed.

gdb/configure

@@ -11262,7 +11262,12 @@ $as_echo_n "checking for python... " >&6; }
 int
 main ()
 {
+
+				    #if PY_MAJOR_VERSION != 3
+				    # error "We only support Python 3"
+				    #endif
 				    Py_Initialize ();
+
   ;
   return 0;
 }
@@ -11280,81 +11285,6 @@ rm -f core conftest.err conftest.$ac_objext \
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
 $as_echo "${found_usable_python}" >&6; }
 
-  elif test "${have_python_config}" != failed; then
-    if test "${have_libpython}" = no; then
-
-
-  new_CPPFLAGS=${python_includes}
-  new_LIBS="-lpython2.7 ${python_libs}"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for python" >&5
-$as_echo_n "checking for python... " >&6; }
-  save_CPPFLAGS=$CPPFLAGS
-  save_LIBS=$LIBS
-  CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
-  LIBS="$new_LIBS $LIBS"
-  found_usable_python=no
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include "Python.h"
-int
-main ()
-{
-Py_Initialize ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  have_libpython=yes
-                  found_usable_python=yes
-                  PYTHON_CPPFLAGS=$new_CPPFLAGS
-                  PYTHON_LIBS=$new_LIBS
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-  CPPFLAGS=$save_CPPFLAGS
-  LIBS=$save_LIBS
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
-$as_echo "${found_usable_python}" >&6; }
-
-    fi
-    if test "${have_libpython}" = no; then
-
-
-  new_CPPFLAGS=${python_includes}
-  new_LIBS="-lpython2.6 ${python_libs}"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for python" >&5
-$as_echo_n "checking for python... " >&6; }
-  save_CPPFLAGS=$CPPFLAGS
-  save_LIBS=$LIBS
-  CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
-  LIBS="$new_LIBS $LIBS"
-  found_usable_python=no
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include "Python.h"
-int
-main ()
-{
-Py_Initialize ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  have_libpython=yes
-                  found_usable_python=yes
-                  PYTHON_CPPFLAGS=$new_CPPFLAGS
-                  PYTHON_LIBS=$new_LIBS
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-  CPPFLAGS=$save_CPPFLAGS
-  LIBS=$save_LIBS
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
-$as_echo "${found_usable_python}" >&6; }
-
-    fi
   fi
 
   if test "${have_libpython}" = no; then

gdb/configure.ac

@@ -717,7 +717,12 @@ AC_DEFUN([AC_TRY_LIBPYTHON],
   LIBS="$new_LIBS $LIBS"
   found_usable_python=no
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "Python.h"]],
-                                 [[Py_Initialize ();]])],
+                                 [[
+				    #if PY_MAJOR_VERSION != 3
+				    # error "We only support Python 3"
+				    #endif
+				    Py_Initialize ();
+				 ]])],
                  [have_libpython_var=yes
                   found_usable_python=yes
                   PYTHON_CPPFLAGS=$new_CPPFLAGS
@@ -733,7 +738,6 @@ dnl no -   Don't include python support.
 dnl yes -  Include python support, error if it's missing.
 dnl        If we find python in $PATH, use it to fetch configure options,
 dnl        otherwise assume the compiler can find it with no help from us.
-dnl        Python 2.7 and 2.6 are tried in turn.
 dnl auto - Same as "yes", but if python is missing from the system,
 dnl        fall back to "no".
 dnl /path/to/python/exec-prefix -
@@ -742,7 +746,6 @@ dnl        If /path/to/python/exec-prefix/bin/python exists, use it to find
 dnl        the compilation parameters.  Otherwise use
 dnl        -I/path/to/python/exec-prefix/include,
 dnl        -L/path/to/python/exec-prefix/lib.
-dnl        Python 2.7 and 2.6 are tried in turn.
 dnl        NOTE: This case is historical.  It is what was done for 7.0/7.1
 dnl        but is deprecated.
 dnl /path/to/python/executable -
@@ -877,15 +880,6 @@ else
   if test "${have_python_config}" = yes; then
     AC_TRY_LIBPYTHON(have_libpython,
                      ${python_includes}, ${python_libs})
-  elif test "${have_python_config}" != failed; then
-    if test "${have_libpython}" = no; then
-      AC_TRY_LIBPYTHON(have_libpython,
-                       ${python_includes}, "-lpython2.7 ${python_libs}")
-    fi
-    if test "${have_libpython}" = no; then
-      AC_TRY_LIBPYTHON(have_libpython,
-                       ${python_includes}, "-lpython2.6 ${python_libs}")
-    fi
   fi
 
   if test "${have_libpython}" = no; then

gdb/doc/python.texi

@@ -18,8 +18,6 @@
 You can extend @value{GDBN} using the @uref{http://www.python.org/,
 Python programming language}.  This feature is available only if
 @value{GDBN} was configured using @option{--with-python}.
-@value{GDBN} can be built against either Python 2 or Python 3; which
-one you have depends on this configure-time option.
 
 @cindex python directory
 Python scripts used by @value{GDBN} should be installed in

gdb/python/lib/gdb/__init__.py

@@ -22,7 +22,7 @@ from contextlib import contextmanager
 # Python 3 moved "reload"
 if sys.version_info >= (3, 4):
     from importlib import reload
-elif sys.version_info[0] > 2:
+else:
     from imp import reload
 
 from _gdb import *

gdb/python/lib/gdb/command/explore.py

@@ -19,10 +19,6 @@
 import gdb
 import sys
 
-if sys.version_info[0] > 2:
-    # Python 3 renamed raw_input to input
-    raw_input = input
-
 
 class Explorer(object):
     """Internal class which invokes other explorers."""
@@ -172,7 +168,7 @@ class Explorer(object):
         so that the exploration session can shift back to the parent value.
         Useful when exploring values.
         """
-        raw_input("\nPress enter to return to parent value: ")
+        input("\nPress enter to return to parent value: ")
 
     @staticmethod
     def return_to_enclosing_type():
@@ -187,7 +183,7 @@ class Explorer(object):
         so that the exploration session can shift back to the enclosing type.
         Useful when exploring types.
         """
-        raw_input("\nPress enter to return to enclosing type: ")
+        input("\nPress enter to return to enclosing type: ")
 
 
 class ScalarExplorer(object):
@@ -244,7 +240,7 @@ class PointerExplorer(object):
             "'%s' is a pointer to a value of type '%s'"
             % (expr, str(value.type.target()))
         )
-        option = raw_input(
+        option = input(
             "Continue exploring it as a pointer to a single " "value [y/n]: "
         )
         if option == "y":
@@ -264,13 +260,13 @@ class PointerExplorer(object):
             )
             return False
 
-        option = raw_input("Continue exploring it as a pointer to an " "array [y/n]: ")
+        option = input("Continue exploring it as a pointer to an " "array [y/n]: ")
         if option == "y":
             while True:
                 index = 0
                 try:
                     index = int(
-                        raw_input(
+                        input(
                             "Enter the index of the element you "
                             "want to explore in '%s': " % expr
                         )
@@ -338,7 +334,7 @@ class ArrayExplorer(object):
         index = 0
         try:
             index = int(
-                raw_input(
+                input(
                     "Enter the index of the element you want to "
                     "explore in '%s': " % expr
                 )
@@ -354,7 +350,7 @@ class ArrayExplorer(object):
             str(element)
         except gdb.MemoryError:
             print("Cannot read value at index %d." % index)
-            raw_input("Press enter to continue... ")
+            input("Press enter to continue... ")
             return True
 
         Explorer.explore_expr(
@@ -474,7 +470,7 @@ class CompoundExplorer(object):
         print("")
 
         if has_explorable_fields:
-            choice = raw_input("Enter the field number of choice: ")
+            choice = input("Enter the field number of choice: ")
             if choice in choice_to_compound_field_map:
                 Explorer.explore_expr(
                     choice_to_compound_field_map[choice][0],
@@ -550,7 +546,7 @@ class CompoundExplorer(object):
         print("")
 
         if len(choice_to_compound_field_map) > 0:
-            choice = raw_input("Enter the field number of choice: ")
+            choice = input("Enter the field number of choice: ")
             if choice in choice_to_compound_field_map:
                 if is_child:
                     new_name = "%s '%s' of %s" % (

gdb/python/lib/gdb/printer/bound_registers.py

@@ -18,11 +18,6 @@ import sys
 
 import gdb.printing
 
-if sys.version_info[0] > 2:
-    # Python 3 removed basestring and long
-    basestring = str
-    long = int
-
 
 class MpxBound128Printer:
     """Adds size field to a mpx __gdb_builtin_type_bound128 type."""
@@ -33,7 +28,7 @@ class MpxBound128Printer:
     def to_string(self):
         upper = self.val["ubound"]
         lower = self.val["lbound"]
-        size = (long)((upper) - (lower))
+        size = upper - lower
         if size > -1:
             size = size + 1
         result = "{lbound = %s, ubound = %s} : size %s" % (lower, upper, size)

gdb/python/lib/gdb/printing.py

@@ -21,11 +21,6 @@ import gdb.types
 import re
 import sys
 
-if sys.version_info[0] > 2:
-    # Python 3 removed basestring and long
-    basestring = str
-    long = int
-
 
 class PrettyPrinter(object):
     """A basic pretty-printer.
@@ -132,7 +127,7 @@ def register_pretty_printer(obj, printer, replace=False):
     # Printers implemented as functions are old-style.  In order to not risk
     # breaking anything we do not check __name__ here.
     if hasattr(printer, "name"):
-        if not isinstance(printer.name, basestring):
+        if not isinstance(printer.name, str):
             raise TypeError("printer name is not a string")
         # If printer provides a name, make sure it doesn't contain ";".
         # Semicolon is used by the info/enable/disable pretty-printer commands
@@ -232,7 +227,7 @@ class _EnumInstance:
 
     def to_string(self):
         flag_list = []
-        v = long(self.val)
+        v = int(self.val)
         any_found = False
         for (e_name, e_value) in self.enumerators:
             if v & e_value != 0:

gdb/python/lib/gdb/xmethod.py

@@ -21,12 +21,6 @@ import re
 import sys
 
 
-if sys.version_info[0] > 2:
-    # Python 3 removed basestring and long
-    basestring = str
-    long = int
-
-
 class XMethod(object):
     """Base class (or a template) for an xmethod description.
 
@@ -223,7 +217,7 @@ def _validate_xmethod_matcher(matcher):
         return TypeError("Xmethod matcher is missing attribute: name")
     if not hasattr(matcher, "enabled"):
         return TypeError("Xmethod matcher is missing attribute: enabled")
-    if not isinstance(matcher.name, basestring):
+    if not isinstance(matcher.name, str):
         return TypeError("Attribute 'name' of xmethod matcher is not a " "string")
     if matcher.name.find(";") >= 0:
         return ValueError("Xmethod matcher name cannot contain ';' in it")

gdb/python/py-arch.c

@@ -148,12 +148,6 @@ archpy_disassemble (PyObject *self, PyObject *args, PyObject *kw)
 	 conversion process.  */
       if (PyLong_Check (end_obj))
 	end = PyLong_AsUnsignedLongLong (end_obj);
-#if PY_MAJOR_VERSION == 2
-      else if (PyInt_Check (end_obj))
-	/* If the end_pc value is specified without a trailing 'L', end_obj will
-	   be an integer and not a long integer.  */
-	end = PyInt_AsLong (end_obj);
-#endif
       else
 	{
 	  PyErr_SetString (PyExc_TypeError,

gdb/python/py-evts.c

@@ -20,7 +20,6 @@
 #include "defs.h"
 #include "py-events.h"
 
-#ifdef IS_PY3K
 static struct PyModuleDef EventModuleDef =
 {
   PyModuleDef_HEAD_INIT,
@@ -33,7 +32,6 @@ static struct PyModuleDef EventModuleDef =
   NULL,
   NULL
 };
-#endif
 
 /* Initialize python events.  */
 
@@ -53,11 +51,7 @@ add_new_registry (eventregistry_object **registryp, const char *name)
 int
 gdbpy_initialize_py_events (void)
 {
-#ifdef IS_PY3K
   gdb_py_events.module = PyModule_Create (&EventModuleDef);
-#else
-  gdb_py_events.module = Py_InitModule ("events", NULL);
-#endif
 
   if (!gdb_py_events.module)
     return -1;

gdb/python/py-framefilter.c

@@ -920,11 +920,7 @@ py_print_frame (PyObject *filter, frame_filter_flags flags,
 
 	      function = function_to_free.get ();
 	    }
-	  else if (PyLong_Check (py_func.get ())
+	  else if (PyLong_Check (py_func.get ()))
-#if PY_MAJOR_VERSION == 2
-		   || PyInt_Check (py_func.get ())
-#endif
-		   )
 	    {
 	      CORE_ADDR addr;
 	      struct bound_minimal_symbol msymbol;

gdb/python/py-membuf.c

@@ -54,15 +54,7 @@ gdbpy_buffer_to_membuf (gdb::unique_xmalloc_ptr<gdb_byte> buffer,
   membuf_obj->addr = address;
   membuf_obj->length = length;
 
-  PyObject *result;
+  return PyMemoryView_FromObject ((PyObject *) membuf_obj.get ());
-#ifdef IS_PY3K
-  result = PyMemoryView_FromObject ((PyObject *) membuf_obj.get ());
-#else
-  result = PyBuffer_FromReadWriteObject ((PyObject *) membuf_obj.get (), 0,
-					 Py_END_OF_BUFFER);
-#endif
-
-  return result;
 }
 
 /* Destructor for gdb.Membuf objects.  */
@@ -88,8 +80,6 @@ which is %s bytes long."),
 			      pulongest (membuf_obj->length));
 }
 
-#ifdef IS_PY3K
-
 static int
 get_buffer (PyObject *self, Py_buffer *buf, int flags)
 {
@@ -107,54 +97,6 @@ get_buffer (PyObject *self, Py_buffer *buf, int flags)
   return ret;
 }
 
-#else
-
-static Py_ssize_t
-get_read_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr)
-{
-  membuf_object *membuf_obj = (membuf_object *) self;
-
-  if (segment)
-    {
-      PyErr_SetString (PyExc_SystemError,
-		       _("The memory buffer supports only one segment."));
-      return -1;
-    }
-
-  *ptrptr = membuf_obj->buffer;
-
-  return membuf_obj->length;
-}
-
-static Py_ssize_t
-get_write_buffer (PyObject *self, Py_ssize_t segment, void **ptrptr)
-{
-  return get_read_buffer (self, segment, ptrptr);
-}
-
-static Py_ssize_t
-get_seg_count (PyObject *self, Py_ssize_t *lenp)
-{
-  if (lenp)
-    *lenp = ((membuf_object *) self)->length;
-
-  return 1;
-}
-
-static Py_ssize_t
-get_char_buffer (PyObject *self, Py_ssize_t segment, char **ptrptr)
-{
-  void *ptr = nullptr;
-  Py_ssize_t ret;
-
-  ret = get_read_buffer (self, segment, &ptr);
-  *ptrptr = (char *) ptr;
-
-  return ret;
-}
-
-#endif	/* IS_PY3K */
-
 /* General Python initialization callback.  */
 
 int
@@ -168,24 +110,11 @@ gdbpy_initialize_membuf (void)
 				 (PyObject *) &membuf_object_type);
 }
 
-#ifdef IS_PY3K
-
 static PyBufferProcs buffer_procs =
 {
   get_buffer
 };
 
-#else
-
-static PyBufferProcs buffer_procs = {
-  get_read_buffer,
-  get_write_buffer,
-  get_seg_count,
-  get_char_buffer
-};
-
-#endif	/* IS_PY3K */
-
 PyTypeObject membuf_object_type = {
   PyVarObject_HEAD_INIT (nullptr, 0)
   "gdb.Membuf",			  /*tp_name*/

gdb/python/py-param.c

@@ -126,11 +126,7 @@ static PyObject *
 get_attr (PyObject *obj, PyObject *attr_name)
 {
   if (PyString_Check (attr_name)
-#ifdef IS_PY3K
       && ! PyUnicode_CompareWithASCIIString (attr_name, "value"))
-#else
-      && ! strcmp (PyString_AsString (attr_name), "value"))
-#endif
     {
       parmpy_object *self = (parmpy_object *) obj;
 
@@ -313,11 +309,7 @@ static int
 set_attr (PyObject *obj, PyObject *attr_name, PyObject *val)
 {
   if (PyString_Check (attr_name)
-#ifdef IS_PY3K
       && ! PyUnicode_CompareWithASCIIString (attr_name, "value"))
-#else
-      && ! strcmp (PyString_AsString (attr_name), "value"))
-#endif
     {
       if (!val)
 	{

gdb/python/py-record-btrace.c

@@ -28,16 +28,6 @@
 #include "disasm.h"
 #include "gdbarch.h"
 
-#if defined (IS_PY3K)
-
-#define BTPY_PYSLICE(x) (x)
-
-#else
-
-#define BTPY_PYSLICE(x) ((PySliceObject *) x)
-
-#endif
-
 /* Python object for btrace record lists.  */
 
 struct btpy_list_object {
@@ -295,12 +285,7 @@ recpy_bt_insn_data (PyObject *self, void *closure)
   if (object == NULL)
     return NULL;
 
-#ifdef IS_PY3K
   return PyMemoryView_FromObject (object);
-#else
-  return PyBuffer_FromObject (object, 0, Py_END_OF_BUFFER);
-#endif
-
 }
 
 /* Implementation of RecordInstruction.decoded [str] for btrace.
@@ -500,7 +485,7 @@ btpy_list_slice (PyObject *self, PyObject *value)
   if (!PySlice_Check (value))
     return PyErr_Format (PyExc_TypeError, _("Index must be int or slice."));
 
-  if (0 != PySlice_GetIndicesEx (BTPY_PYSLICE (value), length, &start, &stop,
+  if (0 != PySlice_GetIndicesEx (value, length, &start, &stop,
 				 &step, &slicelength))
     return NULL;
 

gdb/python/py-type.c

@@ -1610,9 +1610,6 @@ static PyNumberMethods type_object_as_number = {
   NULL,			      /* nb_add */
   NULL,			      /* nb_subtract */
   NULL,			      /* nb_multiply */
-#ifndef IS_PY3K
-  NULL,			      /* nb_divide */
-#endif
   NULL,			      /* nb_remainder */
   NULL,			      /* nb_divmod */
   NULL,			      /* nb_power */
@@ -1626,19 +1623,9 @@ static PyNumberMethods type_object_as_number = {
   NULL,			      /* nb_and */
   NULL,			      /* nb_xor */
   NULL,			      /* nb_or */
-#ifdef IS_PY3K
   NULL,			      /* nb_int */
   NULL,			      /* reserved */
-#else
-  NULL,			      /* nb_coerce */
-  NULL,			      /* nb_int */
-  NULL,			      /* nb_long */
-#endif
   NULL,			      /* nb_float */
-#ifndef IS_PY3K
-  NULL,			      /* nb_oct */
-  NULL			      /* nb_hex */
-#endif
 };
 
 static PyMappingMethods typy_mapping = {

gdb/python/py-utils.c

@@ -45,14 +45,10 @@ python_string_to_unicode (PyObject *obj)
       unicode_str = obj;
       Py_INCREF (obj);
     }
-#ifndef IS_PY3K
-  else if (PyString_Check (obj))
-    unicode_str = PyUnicode_FromEncodedObject (obj, host_charset (), NULL);
-#endif
   else
     {
       PyErr_SetString (PyExc_TypeError,
-		       _("Expected a string or unicode object."));
+		       _("Expected a string object."));
       unicode_str = NULL;
     }
 
@@ -166,11 +162,7 @@ host_string_to_python_string (const char *str)
 int
 gdbpy_is_string (PyObject *obj)
 {
-#ifdef IS_PY3K
   return PyUnicode_Check (obj);
-#else
-  return PyString_Check (obj) || PyUnicode_Check (obj);
-#endif
 }
 
 /* Return the string representation of OBJ, i.e., str (obj).
@@ -182,17 +174,7 @@ gdbpy_obj_to_string (PyObject *obj)
   gdbpy_ref<> str_obj (PyObject_Str (obj));
 
   if (str_obj != NULL)
-    {
+    return python_string_to_host_string (str_obj.get ());
-      gdb::unique_xmalloc_ptr<char> msg;
-
-#ifdef IS_PY3K
-      msg = python_string_to_host_string (str_obj.get ());
-#else
-      msg.reset (xstrdup (PyString_AsString (str_obj.get ())));
-#endif
-
-      return msg;
-    }
 
   return NULL;
 }
@@ -296,20 +278,9 @@ get_addr_from_python (PyObject *obj, CORE_ADDR *addr)
 gdbpy_ref<>
 gdb_py_object_from_longest (LONGEST l)
 {
-#ifdef IS_PY3K
   if (sizeof (l) > sizeof (long))
     return gdbpy_ref<> (PyLong_FromLongLong (l));
   return gdbpy_ref<> (PyLong_FromLong (l));
-#else
-#ifdef HAVE_LONG_LONG		/* Defined by Python.  */
-  /* If we have 'long long', and the value overflows a 'long', use a
-     Python Long; otherwise use a Python Int.  */
-  if (sizeof (l) > sizeof (long)
-      && (l > PyInt_GetMax () || l < (- (LONGEST) PyInt_GetMax ()) - 1))
-    return gdbpy_ref<> (PyLong_FromLongLong (l));
-#endif
-  return gdbpy_ref<> (PyInt_FromLong (l));
-#endif
 }
 
 /* Convert a ULONGEST to the appropriate Python object -- either an
@@ -318,23 +289,9 @@ gdb_py_object_from_longest (LONGEST l)
 gdbpy_ref<>
 gdb_py_object_from_ulongest (ULONGEST l)
 {
-#ifdef IS_PY3K
   if (sizeof (l) > sizeof (unsigned long))
     return gdbpy_ref<> (PyLong_FromUnsignedLongLong (l));
   return gdbpy_ref<> (PyLong_FromUnsignedLong (l));
-#else
-#ifdef HAVE_LONG_LONG		/* Defined by Python.  */
-  /* If we have 'long long', and the value overflows a 'long', use a
-     Python Long; otherwise use a Python Int.  */
-  if (sizeof (l) > sizeof (unsigned long) && l > PyInt_GetMax ())
-    return gdbpy_ref<> (PyLong_FromUnsignedLongLong (l));
-#endif
-
-  if (l > PyInt_GetMax ())
-    return gdbpy_ref<> (PyLong_FromUnsignedLong (l));
-
-  return gdbpy_ref<> (PyInt_FromLong (l));
-#endif
 }
 
 /* Like PyInt_AsLong, but returns 0 on failure, 1 on success, and puts

gdb/python/py-value.c

@@ -1695,41 +1695,6 @@ valpy_richcompare (PyObject *self, PyObject *other, int op)
   Py_RETURN_FALSE;
 }
 
-#ifndef IS_PY3K
-/* Implements conversion to int.  */
-static PyObject *
-valpy_int (PyObject *self)
-{
-  struct value *value = ((value_object *) self)->value;
-  struct type *type = value_type (value);
-  LONGEST l = 0;
-
-  try
-    {
-      if (is_floating_value (value))
-	{
-	  type = builtin_type_pylong;
-	  value = value_cast (type, value);
-	}
-
-      if (!is_integral_type (type)
-	  && type->code () != TYPE_CODE_PTR)
-	error (_("Cannot convert value to int."));
-
-      l = value_as_long (value);
-    }
-  catch (const gdb_exception &except)
-    {
-      GDB_PY_HANDLE_EXCEPTION (except);
-    }
-
-  if (type->is_unsigned ())
-    return gdb_py_object_from_ulongest (l).release ();
-  else
-    return gdb_py_object_from_longest (l).release ();
-}
-#endif
-
 /* Implements conversion to long.  */
 static PyObject *
 valpy_long (PyObject *self)
@@ -1914,15 +1879,6 @@ convert_value_from_python (PyObject *obj)
 	  else
 	    value = value_from_longest (builtin_type_pylong, l);
 	}
-#if PY_MAJOR_VERSION == 2
-      else if (PyInt_Check (obj))
-	{
-	  long l = PyInt_AsLong (obj);
-
-	  if (! PyErr_Occurred ())
-	    value = value_from_longest (builtin_type_pyint, l);
-	}
-#endif
       else if (PyFloat_Check (obj))
 	{
 	  double d = PyFloat_AsDouble (obj);
@@ -1948,14 +1904,8 @@ 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
     }
   catch (const gdb_exception &except)
     {
@@ -2176,9 +2126,6 @@ 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 */
@@ -2192,25 +2139,12 @@ 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 */
-#endif
   NULL,                       /* nb_inplace_add */
   NULL,                       /* nb_inplace_subtract */
   NULL,                       /* nb_inplace_multiply */
-#ifndef IS_PY3K
-  NULL,                       /* nb_inplace_divide */
-#endif
   NULL,                       /* nb_inplace_remainder */
   NULL,                       /* nb_inplace_power */
   NULL,                       /* nb_inplace_lshift */

gdb/python/python-internal.h

@@ -87,11 +87,6 @@
 #include <frameobject.h>
 #include "py-ref.h"
 
-#if PY_MAJOR_VERSION >= 3
-#define IS_PY3K 1
-#endif
-
-#ifdef IS_PY3K
 #define Py_TPFLAGS_CHECKTYPES 0
 
 #define PyInt_Check PyLong_Check
@@ -102,7 +97,6 @@
 #define PyString_Decode PyUnicode_Decode
 #define PyString_FromFormat PyUnicode_FromFormat
 #define PyString_Check PyUnicode_Check
-#endif
 
 /* If Python.h does not define WITH_THREAD, then the various
    GIL-related functions will not be defined.  However,
@@ -209,11 +203,7 @@ gdb_PySys_GetObject (const char *name)
    before Python 3.6.  Hence, we wrap it in a function to avoid errors
    when compiled with -Werror.  */
 
-#ifdef IS_PY3K
 # define GDB_PYSYS_SETPATH_CHAR wchar_t
-#else
-# define GDB_PYSYS_SETPATH_CHAR char
-#endif
 
 static inline void
 gdb_PySys_SetPath (const GDB_PYSYS_SETPATH_CHAR *path)

gdb/python/python.c

@@ -317,11 +317,6 @@ eval_python_command (const char *command)
   if (v == NULL)
     return -1;
 
-#ifndef IS_PY3K
-  if (Py_FlushLine ())
-    PyErr_Clear ();
-#endif
-
   return 0;
 }
 
@@ -1904,7 +1899,6 @@ finalize_python (void *ignore)
   restore_active_ext_lang (previous_active);
 }
 
-#ifdef IS_PY3K
 static struct PyModuleDef python_GdbModuleDef =
 {
   PyModuleDef_HEAD_INIT,
@@ -1927,7 +1921,6 @@ init__gdb_module (void)
 {
   return PyModule_Create (&python_GdbModuleDef);
 }
-#endif
 
 /* Emit a gdb.GdbExitingEvent, return a negative value if there are any
    errors, otherwise, return 0.  */
@@ -1974,7 +1967,6 @@ do_start_initialization ()
   gdb::unique_xmalloc_ptr<char> progname
     (concat (ldirname (python_libdir.c_str ()).c_str (), SLASH_STRING, "bin",
 	      SLASH_STRING, "python", (char *) NULL));
-#ifdef IS_PY3K
   /* Python documentation indicates that the memory given
      to Py_SetProgramName cannot be freed.  However, it seems that
      at least Python 3.7.4 Py_SetProgramName takes a copy of the
@@ -2003,9 +1995,6 @@ do_start_initialization ()
 
   /* Define _gdb as a built-in module.  */
   PyImport_AppendInittab ("_gdb", init__gdb_module);
-#else
-  Py_SetProgramName (progname.release ());
-#endif
 #endif
 
   Py_Initialize ();
@@ -2016,11 +2005,7 @@ do_start_initialization ()
   PyEval_InitThreads ();
 #endif
 
-#ifdef IS_PY3K
   gdb_module = PyImport_ImportModule ("_gdb");
-#else
-  gdb_module = Py_InitModule ("_gdb", python_GdbMethods);
-#endif
   if (gdb_module == NULL)
     return false;
 
@@ -2321,11 +2306,7 @@ do_initialize (const struct extension_language_defn *extlang)
   /* If sys.path is not defined yet, define it first.  */
   if (!(sys_path && PyList_Check (sys_path)))
     {
-#ifdef IS_PY3K
       PySys_SetPath (L"");
-#else
-      PySys_SetPath ("");
-#endif
       sys_path = PySys_GetObject ("path");
     }
   if (sys_path && PyList_Check (sys_path))

gdb/testsuite/gdb.python/py-inferior.exp

@@ -77,11 +77,7 @@ gdb_py_test_silent_cmd "python addr = gdb.selected_frame ().read_var ('str')" \
   "read str address" 0
 gdb_py_test_silent_cmd "python str = gdb.inferiors()\[0\].read_memory (addr, 5); print(str)" \
   "read str contents" 1
-if { $gdb_py_is_py3k == 0 } {
-  gdb_py_test_silent_cmd "python a = 'a'" "" 0
-} else {
 gdb_py_test_silent_cmd "python a = bytes('a', 'ascii')" "" 0
-}
 gdb_py_test_silent_cmd "python str\[1\] = a" "change str" 0
 gdb_py_test_silent_cmd "python gdb.inferiors()\[0\].write_memory (addr, str)" \
   "write str" 1

gdb/testsuite/gdb.python/py-mi-var-info-path-expression.py

@@ -17,27 +17,23 @@ import sys
 import gdb
 import gdb.types
 
-# Following is for Python 3 compatibility...
-if sys.version_info[0] > 2:
-    long = int
-
 
 class cons_pp(object):
     def __init__(self, val):
         self._val = val
 
     def to_string(self):
-        if long(self._val) == 0:
+        if int(self._val) == 0:
             return "nil"
-        elif long(self._val["type"]) == 0:
+        elif int(self._val["type"]) == 0:
             return "( . )"
         else:
             return "%d" % self._val["atom"]["ival"]
 
     def children(self):
-        if long(self._val) == 0:
+        if int(self._val) == 0:
             return []
-        elif long(self._val["type"]) == 0:
+        elif int(self._val["type"]) == 0:
             return [("atom", self._val["atom"])]
         else:
             return [

gdb/testsuite/gdb.python/py-record-btrace.exp

@@ -85,11 +85,7 @@ with_test_prefix "instruction " {
     gdb_test "python print(i.number)" "1"
     gdb_test "python print(i.sal)" "symbol and line for .*"
     gdb_test "python print(i.pc)" "$decimal"
-    if { $gdb_py_is_py3k == 0 } {
-	gdb_test "python print(repr(i.data))" "<read-only buffer for $hex,.*>"
-    } else {
     gdb_test "python print(repr(i.data))" "<memory at $hex>"
-    }
     gdb_test "python print(i.decoded)" ".*"
     gdb_test "python print(i.size)" "$decimal"
     gdb_test "python print(i.is_speculative)" "False"

gdb/testsuite/gdb.python/py-send-packet.py

@@ -81,17 +81,9 @@ def run_send_packet_test():
 # the 'maint packet' command so that the output from the two sources
 # can be compared.
 def bytes_to_string(byte_array):
-
-    # Python 2/3 compatibility.  We need a function that can give us
-    # the value of a single element in BYTE_ARRAY as an integer.
-    if sys.version_info[0] > 2:
-        value_of_single_byte = int
-    else:
-        value_of_single_byte = ord
-
     res = ""
     for b in byte_array:
-        b = value_of_single_byte(b)
+        b = int(b)
         if b >= 32 and b <= 126:
             res = res + ("%c" % b)
         else:
@@ -136,9 +128,9 @@ def run_set_global_var_test():
     res = conn.send_packet(b"X%x,4:\x02\x02\x02\x02" % addr)
     assert isinstance(res, bytes)
     check_global_var(0x02020202)
-    if sys.version_info[0] > 2:
+
-        # On Python 3 this first attempt will not work as we're
+    # This first attempt will not work as we're passing a Unicode string
-        # passing a Unicode string containing non-ascii characters.
+    # containing non-ascii characters.
     saw_error = False
     try:
         res = conn.send_packet("X%x,4:\xff\xff\xff\xff" % addr)
@@ -146,29 +138,13 @@ def run_set_global_var_test():
         saw_error = True
     except:
         assert False
+
     assert saw_error
     check_global_var(0x02020202)
     # Now we pass a bytes object, which will work.
     res = conn.send_packet(b"X%x,4:\xff\xff\xff\xff" % addr)
     check_global_var(0xFFFFFFFF)
-    else:
+
-        # On Python 2 we need to force the creation of a Unicode
-        # string, but, with that done, we expect to see the same error
-        # as on Python 3; the unicode string contains non-ascii
-        # characters.
-        saw_error = False
-        try:
-            res = conn.send_packet(unicode("X%x,4:\xff\xff\xff\xff") % addr)
-        except UnicodeError:
-            saw_error = True
-        except:
-            assert False
-        assert saw_error
-        check_global_var(0x02020202)
-        # Now we pass a plain string, which, on Python 2, is the same
-        # as a bytes object, this, we expect to work.
-        res = conn.send_packet("X%x,4:\xff\xff\xff\xff" % addr)
-        check_global_var(0xFFFFFFFF)
     print("set global_var test passed")
 
 

gdb/testsuite/gdb.python/py-shared.exp

@@ -57,14 +57,11 @@ runto [gdb_get_line_number "Break to end."]
 # Test gdb.solib_name
 gdb_test "p &func1" "" "func1 address"
 gdb_py_test_silent_cmd "python func1 = gdb.history(0)" "Aquire func1 address" 1
-if { $gdb_py_is_py3k == 1 } {
+gdb_test "python print (gdb.solib_name(int(func1)))" "py-shared-sl.sl" "test func1 solib location"
-  gdb_py_test_silent_cmd "python long = int" "" 0
-}
-gdb_test "python print (gdb.solib_name(long(func1)))" "py-shared-sl.sl" "test func1 solib location"
 
 gdb_test "p &main" "" "main address"
 gdb_py_test_silent_cmd "python main = gdb.history(0)" "Aquire main address" 1
-gdb_test "python print (gdb.solib_name(long(main)))" "None" "test main solib location"
+gdb_test "python print (gdb.solib_name(int(main)))" "None" "test main solib location"
 
 if {[is_lp64_target]} {
     gdb_test "python print (len(\[gdb.solib_name(0xffffffffffffffff)\]))" "1"

gdb/testsuite/gdb.python/py-value.exp

@@ -47,33 +47,19 @@ proc build_inferior {exefile lang} {
 
 proc test_value_creation {} {
   global gdb_prompt
-  global gdb_py_is_py3k
 
   gdb_py_test_silent_cmd "python i = gdb.Value (True)" "create boolean value" 1
   gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create integer value" 1
   gdb_py_test_silent_cmd "python i = gdb.Value (3,None)" "create integer value, with None type" 1
-  if { $gdb_py_is_py3k == 0 } {
-    gdb_py_test_silent_cmd "python i = gdb.Value (5L)" "create long value" 1
-  }
 
   gdb_py_test_silent_cmd "python l = gdb.Value(0xffffffff12345678)" "create large unsigned 64-bit value" 1
-  if { $gdb_py_is_py3k == 0 } {
-    gdb_test "python print long(l)" "18446744069720004216" "large unsigned 64-bit int conversion to python"
-  } else {
   gdb_test "python print (int(l))" "18446744069720004216" "large unsigned 64-bit int conversion to python"
-  }
 
   gdb_py_test_silent_cmd "python f = gdb.Value (1.25)" "create double value" 1
   gdb_py_test_silent_cmd "python a = gdb.Value ('string test')" "create 8-bit string value" 1
   gdb_test "python print (a)" "\"string test\"" "print 8-bit string"
   gdb_test "python print (a.__class__)" "<(type|class) 'gdb.Value'>" "verify type of 8-bit string"
 
-  if { $gdb_py_is_py3k == 0 } {
-    gdb_py_test_silent_cmd "python a = gdb.Value (u'unicode test')" "create unicode value" 1
-    gdb_test "python print (a)" "\"unicode test\"" "print Unicode string"
-    gdb_test "python print (a.__class__)" "<(type|class) 'gdb.Value'>" "verify type of unicode string"
-  }
-
   # Test address attribute is None in a non-addressable value
   gdb_test "python print ('result = %s' % i.address)" "= None" "test address attribute in non-addressable value"
 }
@@ -92,7 +78,6 @@ proc test_value_reinit {} {
 
 proc test_value_numeric_ops {} {
   global gdb_prompt
-  global gdb_py_is_py3k
 
   gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create first integer value" 0
   gdb_py_test_silent_cmd "python j = gdb.Value (2)" "create second integer value" 0
@@ -144,9 +129,6 @@ proc test_value_numeric_ops {} {
   gdb_test_no_output "python b = gdb.history (0)" ""
 
   gdb_test "python print(int(b))" "5" "convert pointer to int"
-  if {!$gdb_py_is_py3k} {
-    gdb_test "python print(long(b))" "5" "convert pointer to long"
-  }
 
   gdb_test "python print ('result = ' + str(a+5))" " = 0x7( <.*>)?" "add pointer value with python integer"
   gdb_test "python print ('result = ' + str(b-2))" " = 0x3( <.*>)?" "subtract python integer from pointer value"
@@ -156,17 +138,11 @@ proc test_value_numeric_ops {} {
     "result = r" "use value as string index"
   gdb_test "python print ('result = ' + str((1,2,3)\[gdb.Value(0)\]))" \
     "result = 1" "use value as tuple index"
-  if {!$gdb_py_is_py3k} {
   gdb_test "python print ('result = ' + str(\[1,2,3\]\[gdb.Value(0)\]))" \
     "result = 1" "use value as array index"
-  }
 
   gdb_test "python print('%x' % int(gdb.parse_and_eval('-1ull')))" \
       "f+" "int conversion respect type sign"
-  if {!$gdb_py_is_py3k} {
-    gdb_test "python print('%x' % long(gdb.parse_and_eval('-1ull')))" \
-      "f+" "long conversion respect type sign"
-  }
 
   # Test some invalid operations.
 
@@ -242,7 +218,6 @@ proc test_value_compare {} {
 proc test_value_in_inferior {} {
   global gdb_prompt
   global testfile
-  global gdb_py_is_py3k
 
   gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
   gdb_continue_to_breakpoint "break to inspect struct and union"
@@ -253,9 +228,6 @@ proc test_value_in_inferior {} {
   gdb_py_test_silent_cmd "python s = gdb.history (0)" "get value s from history" 1
 
   gdb_test "python print ('result = ' + str(s\['a'\]))" " = 3" "access element inside struct using 8-bit string name"
-  if { $gdb_py_is_py3k == 0 } {
-    gdb_test "python print ('result = ' + str(s\[u'a'\]))" " = 3" "access element inside struct using unicode name"
-  }
 
   # Test dereferencing the argv pointer
 
@@ -533,13 +505,8 @@ proc test_value_hash {} {
 }
 
 proc test_float_conversion {} {
-    global gdb_py_is_py3k
     gdb_test "python print(int(gdb.Value(0)))" "0"
     gdb_test "python print(int(gdb.Value(2.5)))" "2"
-    if {!$gdb_py_is_py3k} {
-	gdb_test "python print(long(gdb.Value(0)))" "0"
-	gdb_test "python print(long(gdb.Value(2.5)))" "2"
-    }
     gdb_test "python print(float(gdb.Value(2.5)))" "2\\.5"
     gdb_test "python print(float(gdb.Value(0)))" "0\\.0"
 }
@@ -565,7 +532,6 @@ proc prepare_type_and_buffer {} {
 
 proc test_value_from_buffer {} {
   global gdb_prompt
-  global gdb_py_is_py3k
 
   prepare_type_and_buffer
   gdb_test "python v=gdb.Value(b,tp); print(v)" "1" \

gdb/testsuite/lib/gdb.exp

@@ -2360,8 +2360,6 @@ proc skip_rust_tests {} {
 # PROMPT_REGEXP is the expected prompt.
 
 proc skip_python_tests_prompt { prompt_regexp } {
-    global gdb_py_is_py3k
-
     gdb_test_multiple "python print ('test')" "verify python support" \
 	-prompt "$prompt_regexp" {
 	    -re "not supported.*$prompt_regexp" {
@@ -2371,16 +2369,6 @@ proc skip_python_tests_prompt { prompt_regexp } {
 	    -re "$prompt_regexp" {}
 	}
 
-    gdb_test_multiple "python print (sys.version_info\[0\])" "check if python 3" \
-	-prompt "$prompt_regexp" {
-	    -re "3.*$prompt_regexp" {
-		set gdb_py_is_py3k 1
-	    }
-	    -re ".*$prompt_regexp" {
-		set gdb_py_is_py3k 0
-	    }
-	}
-
     return 0
 }