1# Type printer commands. 2# Copyright (C) 2010-2020 Free Software Foundation, Inc. 3 4# This program is free software; you can redistribute it and/or modify 5# it under the terms of the GNU General Public License as published by 6# the Free Software Foundation; either version 3 of the License, or 7# (at your option) any later version. 8# 9# This program is distributed in the hope that it will be useful, 10# but WITHOUT ANY WARRANTY; without even the implied warranty of 11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12# GNU General Public License for more details. 13# 14# You should have received a copy of the GNU General Public License 15# along with this program. If not, see <http://www.gnu.org/licenses/>. 16 17import copy 18import gdb 19 20"""GDB commands for working with type-printers.""" 21 22class InfoTypePrinter(gdb.Command): 23 """GDB command to list all registered type-printers. 24 25Usage: info type-printers""" 26 27 def __init__ (self): 28 super(InfoTypePrinter, self).__init__("info type-printers", 29 gdb.COMMAND_DATA) 30 31 def list_type_printers(self, type_printers): 32 """Print a list of type printers.""" 33 # A potential enhancement is to provide an option to list printers in 34 # "lookup order" (i.e. unsorted). 35 sorted_type_printers = sorted (copy.copy(type_printers), 36 key = lambda x: x.name) 37 for printer in sorted_type_printers: 38 if printer.enabled: 39 enabled = '' 40 else: 41 enabled = " [disabled]" 42 print (" %s%s" % (printer.name, enabled)) 43 44 def invoke(self, arg, from_tty): 45 """GDB calls this to perform the command.""" 46 sep = '' 47 for objfile in gdb.objfiles(): 48 if objfile.type_printers: 49 print ("%sType printers for %s:" % (sep, objfile.filename)) 50 self.list_type_printers(objfile.type_printers) 51 sep = '\n' 52 if gdb.current_progspace().type_printers: 53 print ("%sType printers for program space:" % sep) 54 self.list_type_printers(gdb.current_progspace().type_printers) 55 sep = '\n' 56 if gdb.type_printers: 57 print ("%sGlobal type printers:" % sep) 58 self.list_type_printers(gdb.type_printers) 59 60class _EnableOrDisableCommand(gdb.Command): 61 def __init__(self, setting, name): 62 super(_EnableOrDisableCommand, self).__init__(name, gdb.COMMAND_DATA) 63 self.setting = setting 64 65 def set_some(self, name, printers): 66 result = False 67 for p in printers: 68 if name == p.name: 69 p.enabled = self.setting 70 result = True 71 return result 72 73 def invoke(self, arg, from_tty): 74 """GDB calls this to perform the command.""" 75 for name in arg.split(): 76 ok = False 77 for objfile in gdb.objfiles(): 78 if self.set_some(name, objfile.type_printers): 79 ok = True 80 if self.set_some(name, gdb.current_progspace().type_printers): 81 ok = True 82 if self.set_some(name, gdb.type_printers): 83 ok = True 84 if not ok: 85 print ("No type printer named '%s'" % name) 86 87 def add_some(self, result, word, printers): 88 for p in printers: 89 if p.name.startswith(word): 90 result.append(p.name) 91 92 def complete(self, text, word): 93 result = [] 94 for objfile in gdb.objfiles(): 95 self.add_some(result, word, objfile.type_printers) 96 self.add_some(result, word, gdb.current_progspace().type_printers) 97 self.add_some(result, word, gdb.type_printers) 98 return result 99 100class EnableTypePrinter(_EnableOrDisableCommand): 101 """GDB command to enable the specified type printer. 102 103Usage: enable type-printer NAME 104 105NAME is the name of the type-printer.""" 106 107 def __init__(self): 108 super(EnableTypePrinter, self).__init__(True, "enable type-printer") 109 110class DisableTypePrinter(_EnableOrDisableCommand): 111 """GDB command to disable the specified type-printer. 112 113Usage: disable type-printer NAME 114 115NAME is the name of the type-printer.""" 116 117 def __init__(self): 118 super(DisableTypePrinter, self).__init__(False, "disable type-printer") 119 120InfoTypePrinter() 121EnableTypePrinter() 122DisableTypePrinter() 123