gdb/testsuite/gdb.python/py-frame-args.py

   1 # Copyright (C) 2013-2021 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 re
  17 import gdb
  18
  19
  20 class pp_s(object):
  21     def __init__(self, val):
  22         self.val = val
  23
  24     def to_string(self):
  25         m = self.val["m"]
  26         return "m=<" + str(self.val["m"]) + ">"
  27
  28
  29 class pp_ss(object):
  30     def __init__(self, val):
  31         self.val = val
  32
  33     def to_string(self):
  34         return "super struct"
  35
  36     def children(self):
  37         yield "a", self.val["a"]
  38         yield "b", self.val["b"]
  39
  40
  41 def lookup_function(val):
  42     "Look-up and return a pretty-printer that can print val."
  43
  44     # Get the type.
  45     type = val.type
  46
  47     # If it points to a reference, get the reference.
  48     if type.code == gdb.TYPE_CODE_REF:
  49         type = type.target()
  50
  51     # Get the unqualified type, stripped of typedefs.
  52     type = type.unqualified().strip_typedefs()
  53
  54     # Get the type name.
  55     typename = type.tag
  56     if typename is None:
  57         return None
  58
  59     # Iterate over local dictionary of types to determine
  60     # if a printer is registered for that type.  Return an
  61     # instantiation of the printer if found.
  62     for function in pretty_printers_dict:
  63         if function.match(typename):
  64             return pretty_printers_dict[function](val)
  65
  66     # Cannot find a pretty printer.  Return None.
  67     return None
  68
  69
  70 def register_pretty_printers():
  71     pretty_printers_dict[re.compile("^s$")] = pp_s
  72     pretty_printers_dict[re.compile("^ss$")] = pp_ss
  73
  74
  75 pretty_printers_dict = {}
  76
  77 register_pretty_printers()
  78 gdb.pretty_printers.append(lookup_function)