1# Copyright (C) 2008-2023 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 GDB's handling of 17# bad python pretty printers. 18 19# Test a printer with a bad children iterator. 20 21import re 22import gdb.printing 23 24 25class BadChildrenContainerPrinter1(object): 26 """Children iterator doesn't return a tuple of two elements.""" 27 28 def __init__(self, val): 29 self.val = val 30 31 def to_string(self): 32 return "container %s with %d elements" % (self.val["name"], self.val["len"]) 33 34 @staticmethod 35 def _bad_iterator(pointer, len): 36 start = pointer 37 end = pointer + len 38 while pointer != end: 39 yield "intentional violation of children iterator protocol" 40 pointer += 1 41 42 def children(self): 43 return self._bad_iterator(self.val["elements"], self.val["len"]) 44 45 46class BadChildrenContainerPrinter2(object): 47 """Children iterator returns a tuple of two elements with bad values.""" 48 49 def __init__(self, val): 50 self.val = val 51 52 def to_string(self): 53 return "container %s with %d elements" % (self.val["name"], self.val["len"]) 54 55 @staticmethod 56 def _bad_iterator(pointer, len): 57 start = pointer 58 end = pointer + len 59 while pointer != end: 60 # The first argument is supposed to be a string. 61 yield (42, "intentional violation of children iterator protocol") 62 pointer += 1 63 64 def children(self): 65 return self._bad_iterator(self.val["elements"], self.val["len"]) 66 67 68def build_pretty_printer(): 69 pp = gdb.printing.RegexpCollectionPrettyPrinter("bad-printers") 70 71 pp.add_printer("container1", "^container$", BadChildrenContainerPrinter1) 72 pp.add_printer("container2", "^container$", BadChildrenContainerPrinter2) 73 74 return pp 75 76 77my_pretty_printer = build_pretty_printer() 78gdb.printing.register_pretty_printer(gdb, my_pretty_printer) 79