diff options
Diffstat (limited to 'share/gdb/python/gdb/printing.py')
-rw-r--r-- | share/gdb/python/gdb/printing.py | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/share/gdb/python/gdb/printing.py b/share/gdb/python/gdb/printing.py index a030827..785a407 100644 --- a/share/gdb/python/gdb/printing.py +++ b/share/gdb/python/gdb/printing.py @@ -1,5 +1,5 @@ # Pretty-printer utilities. -# Copyright (C) 2010, 2011 Free Software Foundation, Inc. +# Copyright (C) 2010-2013 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -19,7 +19,12 @@ import gdb import gdb.types import re +import sys +if sys.version_info[0] > 2: + # Python 3 removed basestring and long + basestring = str + long = int class PrettyPrinter(object): """A basic pretty-printer. @@ -206,3 +211,53 @@ class RegexpCollectionPrettyPrinter(PrettyPrinter): # Cannot find a pretty printer. Return None. return None + +# A helper class for printing enum types. This class is instantiated +# with a list of enumerators to print a particular Value. +class _EnumInstance: + def __init__(self, enumerators, val): + self.enumerators = enumerators + self.val = val + + def to_string(self): + flag_list = [] + v = long(self.val) + any_found = False + for (e_name, e_value) in self.enumerators: + if v & e_value != 0: + flag_list.append(e_name) + v = v & ~e_value + any_found = True + if not any_found or v != 0: + # Leftover value. + flag_list.append('<unknown: 0x%x>' % v) + return "0x%x [%s]" % (self.val, " | ".join(flag_list)) + +class FlagEnumerationPrinter(PrettyPrinter): + """A pretty-printer which can be used to print a flag-style enumeration. + A flag-style enumeration is one where the enumerators are or'd + together to create values. The new printer will print these + symbolically using '|' notation. The printer must be registered + manually. This printer is most useful when an enum is flag-like, + but has some overlap. GDB's built-in printing will not handle + this case, but this printer will attempt to.""" + + def __init__(self, enum_type): + super(FlagEnumerationPrinter, self).__init__(enum_type) + self.initialized = False + + def __call__(self, val): + if not self.initialized: + self.initialized = True + flags = gdb.lookup_type(self.name) + self.enumerators = [] + for field in flags.fields(): + self.enumerators.append((field.name, field.enumval)) + # Sorting the enumerators by value usually does the right + # thing. + self.enumerators.sort(key = lambda x: x.enumval) + + if self.enabled: + return _EnumInstance(self.enumerators, val) + else: + return None |