gdb/testsuite/gdb.python/py-objfile-script-gdb.py

   1 # Copyright (C) 2011-2017 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 # This file is part of the GDB testsuite.
  17
  18 import re
  19
  20 class pp_ss:
  21     def __init__(self, val):
  22         self.val = val
  23
  24     def to_string(self):
  25         return "a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
  26
  27 def lookup_function (val):
  28     "Look-up and return a pretty-printer that can print val."
  29
  30     # Get the type.
  31     type = val.type
  32
  33     # If it points to a reference, get the reference.
  34     if type.code == gdb.TYPE_CODE_REF:
  35         type = type.target ()
  36
  37     # Get the unqualified type, stripped of typedefs.
  38     type = type.unqualified ().strip_typedefs ()
  39
  40     # Get the type name.
  41     typename = type.tag
  42
  43     if typename == None:
  44         return None
  45
  46     # Iterate over local dictionary of types to determine
  47     # if a printer is registered for that type.  Return an
  48     # instantiation of the printer if found.
  49     for function in pretty_printers_dict:
  50         if function.match (typename):
  51             return pretty_printers_dict[function] (val)
  52
  53     # Cannot find a pretty printer.  Return None.
  54
  55     return None
  56
  57 def register_pretty_printers ():
  58     pretty_printers_dict[re.compile ('^ss$')]  = pp_ss
  59
  60 pretty_printers_dict = {}
  61
  62 register_pretty_printers ()
  63 gdb.current_progspace().pretty_printers.append (lookup_function)