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      1 # Copyright (C) 2021-2024 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)
     56