gdb/testsuite/gdb.python/py-pending-frame-level.py

   1 # Copyright (C) 2021-2022 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 from gdb.unwinder import Unwinder
  18
  19
  20 class FrameId(object):
  21     def __init__(self, sp, pc):
  22         self._sp = sp
  23         self._pc = pc
  24
  25     @property
  26     def sp(self):
  27         return self._sp
  28
  29     @property
  30     def pc(self):
  31         return self._pc
  32
  33
  34 class TestUnwinder(Unwinder):
  35     def __init__(self):
  36         Unwinder.__init__(self, "show level")
  37
  38     def __call__(self, pending_frame):
  39         pc_desc = pending_frame.architecture().registers().find("pc")
  40         pc = pending_frame.read_register(pc_desc)
  41
  42         block = gdb.block_for_pc(int(pc))
  43         if block is None:
  44             return None
  45         func = block.function
  46         if func is None:
  47             return None
  48
  49         print("Func %s, Level %d" % (str(func), pending_frame.level()))
  50
  51         # This unwinder never claims any frames.
  52         return None
  53
  54
  55 gdb.unwinder.register_unwinder(None, TestUnwinder(), True)