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# Copyright (C) 2008-2019 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 handling of
# bad python pretty printers.
# Test a printer with a bad children iterator.
import re
import gdb.printing
class BadChildrenContainerPrinter1(object):
"""Children iterator doesn't return a tuple of two elements."""
def __init__(self, val):
self.val = val
def to_string(self):
return 'container %s with %d elements' % (self.val['name'], self.val['len'])
@staticmethod
def _bad_iterator(pointer, len):
start = pointer
end = pointer + len
while pointer != end:
yield 'intentional violation of children iterator protocol'
pointer += 1
def children(self):
return self._bad_iterator(self.val['elements'], self.val['len'])
class BadChildrenContainerPrinter2(object):
"""Children iterator returns a tuple of two elements with bad values."""
def __init__(self, val):
self.val = val
def to_string(self):
return 'container %s with %d elements' % (self.val['name'], self.val['len'])
@staticmethod
def _bad_iterator(pointer, len):
start = pointer
end = pointer + len
while pointer != end:
# The first argument is supposed to be a string.
yield (42, 'intentional violation of children iterator protocol')
pointer += 1
def children(self):
return self._bad_iterator(self.val['elements'], self.val['len'])
def build_pretty_printer():
pp = gdb.printing.RegexpCollectionPrettyPrinter("bad-printers")
pp.add_printer('container1', '^container$',
BadChildrenContainerPrinter1)
pp.add_printer('container2', '^container$',
BadChildrenContainerPrinter2)
return pp
my_pretty_printer = build_pretty_printer()
gdb.printing.register_pretty_printer(gdb, my_pretty_printer)
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