gdb/python/lib/gdb/FrameIterator.py

   1 # Copyright (C) 2013-2017 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 import gdb
  17 import itertools
  18
  19 class FrameIterator(object):
  20     """A gdb.Frame iterator.  Iterates over gdb.Frames or objects that
  21     conform to that interface."""
  22
  23     def __init__(self, frame_obj):
  24         """Initialize a FrameIterator.
  25
  26         Arguments:
  27             frame_obj the starting frame."""
  28
  29         super(FrameIterator, self).__init__()
  30         self.frame = frame_obj
  31
  32     def __iter__(self):
  33         return self
  34
  35     def next(self):
  36         """next implementation.
  37
  38         Returns:
  39             The next oldest frame."""
  40
  41         result = self.frame
  42         if result is None:
  43             raise StopIteration
  44         self.frame = result.older()
  45         return result
  46
  47     # Python 3.x requires __next__(self) while Python 2.x requires
  48     # next(self).  Define next(self), and for Python 3.x create this
  49     # wrapper.
  50     def __next__(self):
  51         return self.next()