gdb/testsuite/gdb.python/py-pp-maint.py

   1 # Copyright (C) 2010-2018 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.  It tests python pretty
  17 # printers.
  18
  19 import re
  20 import gdb.types
  21 import gdb.printing
  22
  23
  24 def lookup_function_lookup_test(val):
  25     class PrintFunctionLookup(object):
  26         def __init__(self, val):
  27             self.val = val
  28
  29         def to_string(self):
  30             return ("x=<" + str(self.val["x"]) +
  31                     "> y=<" + str(self.val["y"]) + ">")
  32
  33     typename = gdb.types.get_basic_type(val.type).tag
  34     # Note: typename could be None.
  35     if typename == "function_lookup_test":
  36         return PrintFunctionLookup(val)
  37     return None
  38
  39
  40 class pp_s (object):
  41     def __init__(self, val):
  42         self.val = val
  43
  44     def to_string(self):
  45         a = self.val["a"]
  46         b = self.val["b"]
  47         if a.address != b:
  48             raise Exception("&a(%s) != b(%s)" % (str(a.address), str(b)))
  49         return "a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
  50
  51
  52 class pp_ss (object):
  53     def __init__(self, val):
  54         self.val = val
  55
  56     def to_string(self):
  57         return "a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
  58
  59
  60 def build_pretty_printer():
  61     pp = gdb.printing.RegexpCollectionPrettyPrinter("pp-test")
  62
  63     pp.add_printer('struct s', '^struct s$', pp_s)
  64     pp.add_printer('s', '^s$', pp_s)
  65
  66     # Use a lambda this time to exercise doing things this way.
  67     pp.add_printer('struct ss', '^struct ss$', lambda val: pp_ss(val))
  68     pp.add_printer('ss', '^ss$', lambda val: pp_ss(val))
  69
  70     pp.add_printer('enum flag_enum', '^flag_enum$',
  71                    gdb.printing.FlagEnumerationPrinter('enum flag_enum'))
  72
  73     return pp
  74
  75
  76 gdb.printing.register_pretty_printer(gdb, lookup_function_lookup_test)
  77 my_pretty_printer = build_pretty_printer()
  78 gdb.printing.register_pretty_printer(gdb, my_pretty_printer)