/usr/share/gdb/python/gdb/command/unwinders.py is in gdb 7.11-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | # Unwinder commands.
# Copyright 2015-2016 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/>.
import gdb
import re
def validate_regexp(exp, idstring):
try:
return re.compile(exp)
except SyntaxError:
raise SyntaxError("Invalid %s regexp: %s." % (idstring, exp))
def parse_unwinder_command_args(arg):
"""Internal utility to parse unwinder command argv.
Arguments:
arg: The arguments to the command. The format is:
[locus-regexp [name-regexp]]
Returns:
A 2-tuple of compiled regular expressions.
Raises:
SyntaxError: an error processing ARG
"""
argv = gdb.string_to_argv(arg)
argc = len(argv)
if argc > 2:
raise SyntaxError("Too many arguments.")
locus_regexp = ""
name_regexp = ""
if argc >= 1:
locus_regexp = argv[0]
if argc >= 2:
name_regexp = argv[1]
return (validate_regexp(locus_regexp, "locus"),
validate_regexp(name_regexp, "unwinder"))
class InfoUnwinder(gdb.Command):
"""GDB command to list unwinders.
Usage: info unwinder [locus-regexp [name-regexp]]
LOCUS-REGEXP is a regular expression matching the location of the
unwinder. If it is omitted, all registered unwinders from all
loci are listed. A locus can be 'global', 'progspace' to list
the unwinders from the current progspace, or a regular expression
matching filenames of objfiles.
NAME-REGEXP is a regular expression to filter unwinder names. If
this omitted for a specified locus, then all registered unwinders
in the locus are listed.
"""
def __init__(self):
super(InfoUnwinder, self).__init__("info unwinder",
gdb.COMMAND_STACK)
def list_unwinders(self, title, unwinders, name_re):
"""Lists the unwinders whose name matches regexp.
Arguments:
title: The line to print before the list.
unwinders: The list of the unwinders.
name_re: unwinder name filter.
"""
if not unwinders:
return
print(title)
for unwinder in unwinders:
if name_re.match(unwinder.name):
print(" %s%s" % (unwinder.name,
"" if unwinder.enabled else " [disabled]"))
def invoke(self, arg, from_tty):
locus_re, name_re = parse_unwinder_command_args(arg)
if locus_re.match("global"):
self.list_unwinders("Global:", gdb.frame_unwinders,
name_re)
if locus_re.match("progspace"):
cp = gdb.current_progspace()
self.list_unwinders("Progspace %s:" % cp.filename,
cp.frame_unwinders, name_re)
for objfile in gdb.objfiles():
if locus_re.match(objfile.filename):
self.list_unwinders("Objfile %s:" % objfile.filename,
objfile.frame_unwinders, name_re)
def do_enable_unwinder1(unwinders, name_re, flag):
"""Enable/disable unwinders whose names match given regex.
Arguments:
unwinders: The list of unwinders.
name_re: Unwinder name filter.
flag: Enable/disable.
Returns:
The number of unwinders affected.
"""
total = 0
for unwinder in unwinders:
if name_re.match(unwinder.name):
unwinder.enabled = flag
total += 1
return total
def do_enable_unwinder(arg, flag):
"""Enable/disable unwinder(s)."""
(locus_re, name_re) = parse_unwinder_command_args(arg)
total = 0
if locus_re.match("global"):
total += do_enable_unwinder1(gdb.frame_unwinders, name_re, flag)
if locus_re.match("progspace"):
total += do_enable_unwinder1(gdb.current_progspace().frame_unwinders,
name_re, flag)
for objfile in gdb.objfiles():
if locus_re.match(objfile.filename):
total += do_enable_unwinder1(objfile.frame_unwinders, name_re,
flag)
print("%d unwinder%s %s" % (total, "" if total == 1 else "s",
"enabled" if flag else "disabled"))
class EnableUnwinder(gdb.Command):
"""GDB command to enable unwinders.
Usage: enable unwinder [locus-regexp [name-regexp]]
LOCUS-REGEXP is a regular expression specifying the unwinders to
enable. It can 'global', 'progspace', or the name of an objfile
within that progspace.
NAME_REGEXP is a regular expression to filter unwinder names. If
this omitted for a specified locus, then all registered unwinders
in the locus are affected.
"""
def __init__(self):
super(EnableUnwinder, self).__init__("enable unwinder",
gdb.COMMAND_STACK)
def invoke(self, arg, from_tty):
"""GDB calls this to perform the command."""
do_enable_unwinder(arg, True)
class DisableUnwinder(gdb.Command):
"""GDB command to disable the specified unwinder.
Usage: disable unwinder [locus-regexp [name-regexp]]
LOCUS-REGEXP is a regular expression specifying the unwinders to
disable. It can 'global', 'progspace', or the name of an objfile
within that progspace.
NAME_REGEXP is a regular expression to filter unwinder names. If
this omitted for a specified locus, then all registered unwinders
in the locus are affected.
"""
def __init__(self):
super(DisableUnwinder, self).__init__("disable unwinder",
gdb.COMMAND_STACK)
def invoke(self, arg, from_tty):
"""GDB calls this to perform the command."""
do_enable_unwinder(arg, False)
def register_unwinder_commands():
"""Installs the unwinder commands."""
InfoUnwinder()
EnableUnwinder()
DisableUnwinder()
register_unwinder_commands()
|