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# Copyright (C) 2019 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
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file is part of the GDB testsuite. It tests GDB's printing of
# nested map like structures.
import re
import gdb
def _iterator1 (pointer, len):
while len > 0:
map = pointer.dereference()
yield ('', map['name'])
yield ('', map.dereference())
pointer += 1
len -= 1
def _iterator2 (pointer1, pointer2, len):
while len > 0:
yield ("", pointer1.dereference())
yield ("", pointer2.dereference())
pointer1 += 1
pointer2 += 1
len -= 1
class pp_map (object):
def __init__(self, val):
self.val = val
def to_string(self):
if (self.val['show_header'] == 0):
return None
else:
return "pp_map"
def children(self):
return _iterator2(self.val['keys'],
self.val['values'],
self.val['length'])
def display_hint (self):
return 'map'
class pp_map_map (object):
def __init__(self, val):
self.val = val
def to_string(self):
if (self.val['show_header'] == 0):
return None
else:
return "pp_map_map"
def children(self):
return _iterator1(self.val['values'],
self.val['length'])
def display_hint (self):
return 'map'
def lookup_function (val):
"Look-up and return a pretty-printer that can print val."
# Get the type.
type = val.type
# If it points to a reference, get the reference.
if type.code == gdb.TYPE_CODE_REF:
type = type.target ()
# Get the unqualified type, stripped of typedefs.
type = type.unqualified ().strip_typedefs ()
# Get the type name.
typename = type.tag
if typename == None:
return None
# Iterate over local dictionary of types to determine
# if a printer is registered for that type. Return an
# instantiation of the printer if found.
for function in pretty_printers_dict:
if function.match (typename):
return pretty_printers_dict[function] (val)
# Cannot find a pretty printer. Return None.
return None
# Lookup a printer for VAL in the typedefs dict.
def lookup_typedefs_function (val):
"Look-up and return a pretty-printer that can print val (typedefs)."
# Get the type.
type = val.type
if type == None or type.name == None or type.code != gdb.TYPE_CODE_TYPEDEF:
return None
# Iterate over local dictionary of typedef types to determine if a
# printer is registered for that type. Return an instantiation of
# the printer if found.
for function in typedefs_pretty_printers_dict:
if function.match (type.name):
return typedefs_pretty_printers_dict[function] (val)
# Cannot find a pretty printer.
return None
def register_pretty_printers ():
pretty_printers_dict[re.compile ('^struct map_t$')] = pp_map
pretty_printers_dict[re.compile ('^map_t$')] = pp_map
pretty_printers_dict[re.compile ('^struct map_map_t$')] = pp_map_map
pretty_printers_dict[re.compile ('^map_map_t$')] = pp_map_map
# Dict for struct types with typedefs fully stripped.
pretty_printers_dict = {}
# Dict for typedef types.
typedefs_pretty_printers_dict = {}
register_pretty_printers ()
gdb.pretty_printers.append (lookup_function)
gdb.pretty_printers.append (lookup_typedefs_function)
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