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

   1 # Copyright (C) 2013-2014 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 class pp_s (object):
  20     def __init__(self, val):
  21         self.val = val
  22
  23     def to_string(self):
  24         m = self.val["m"]
  25         return "m=<" + str(self.val["m"]) + ">"
  26
  27 class pp_ss (object):
  28     def __init__(self, val):
  29         self.val = val
  30
  31     def to_string(self):
  32         return "super struct"
  33
  34     def children (self):
  35         yield 'a', self.val['a']
  36         yield 'b', self.val['b']
  37
  38
  39 def lookup_function (val):
  40     "Look-up and return a pretty-printer that can print val."
  41
  42     # Get the type.
  43     type = val.type
  44
  45     # If it points to a reference, get the reference.
  46     if type.code == gdb.TYPE_CODE_REF:
  47         type = type.target ()
  48
  49     # Get the unqualified type, stripped of typedefs.
  50     type = type.unqualified ().strip_typedefs ()
  51
  52     # Get the type name.
  53     typename = type.tag
  54     if typename == None:
  55         return None
  56
  57     # Iterate over local dictionary of types to determine
  58     # if a printer is registered for that type.  Return an
  59     # instantiation of the printer if found.
  60     for function in pretty_printers_dict:
  61         if function.match (typename):
  62             return pretty_printers_dict[function] (val)
  63
  64     # Cannot find a pretty printer.  Return None.
  65     return None
  66
  67
  68 def register_pretty_printers ():
  69     pretty_printers_dict[re.compile ('^s$')] = pp_s
  70     pretty_printers_dict[re.compile ('^ss$')] = pp_ss
  71
  72 pretty_printers_dict = {}
  73
  74 register_pretty_printers ()
  75 gdb.pretty_printers.append (lookup_function)