2 # Copyright 2015-2021 Free Software Foundation, Inc.
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.
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.
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/>.
21 def validate_regexp(exp, idstring):
23 return re.compile(exp)
25 raise SyntaxError("Invalid %s regexp: %s." % (idstring, exp))
28 def parse_unwinder_command_args(arg):
29 """Internal utility to parse unwinder command argv.
32 arg: The arguments to the command. The format is:
33 [locus-regexp [name-regexp]]
36 A 2-tuple of compiled regular expressions.
39 SyntaxError: an error processing ARG
42 argv = gdb.string_to_argv(arg)
45 raise SyntaxError("Too many arguments.")
49 locus_regexp = argv[0]
53 validate_regexp(locus_regexp, "locus"),
54 validate_regexp(name_regexp, "unwinder"),
58 class InfoUnwinder(gdb.Command):
59 """GDB command to list unwinders.
61 Usage: info unwinder [LOCUS-REGEXP [NAME-REGEXP]]
63 LOCUS-REGEXP is a regular expression matching the location of the
64 unwinder. If it is omitted, all registered unwinders from all
65 loci are listed. A locus can be 'global', 'progspace' to list
66 the unwinders from the current progspace, or a regular expression
67 matching filenames of objfiles.
69 NAME-REGEXP is a regular expression to filter unwinder names. If
70 this omitted for a specified locus, then all registered unwinders
71 in the locus are listed."""
74 super(InfoUnwinder, self).__init__("info unwinder", gdb.COMMAND_STACK)
76 def list_unwinders(self, title, unwinders, name_re):
77 """Lists the unwinders whose name matches regexp.
80 title: The line to print before the list.
81 unwinders: The list of the unwinders.
82 name_re: unwinder name filter.
87 for unwinder in unwinders:
88 if name_re.match(unwinder.name):
91 % (unwinder.name, "" if unwinder.enabled else " [disabled]")
94 def invoke(self, arg, from_tty):
95 locus_re, name_re = parse_unwinder_command_args(arg)
96 if locus_re.match("global"):
97 self.list_unwinders("Global:", gdb.frame_unwinders, name_re)
98 if locus_re.match("progspace"):
99 cp = gdb.current_progspace()
101 "Progspace %s:" % cp.filename, cp.frame_unwinders, name_re
103 for objfile in gdb.objfiles():
104 if locus_re.match(objfile.filename):
106 "Objfile %s:" % objfile.filename, objfile.frame_unwinders, name_re
110 def do_enable_unwinder1(unwinders, name_re, flag):
111 """Enable/disable unwinders whose names match given regex.
114 unwinders: The list of unwinders.
115 name_re: Unwinder name filter.
116 flag: Enable/disable.
119 The number of unwinders affected.
122 for unwinder in unwinders:
123 if name_re.match(unwinder.name):
124 unwinder.enabled = flag
129 def do_enable_unwinder(arg, flag):
130 """Enable/disable unwinder(s)."""
131 (locus_re, name_re) = parse_unwinder_command_args(arg)
133 if locus_re.match("global"):
134 total += do_enable_unwinder1(gdb.frame_unwinders, name_re, flag)
135 if locus_re.match("progspace"):
136 total += do_enable_unwinder1(
137 gdb.current_progspace().frame_unwinders, name_re, flag
139 for objfile in gdb.objfiles():
140 if locus_re.match(objfile.filename):
141 total += do_enable_unwinder1(objfile.frame_unwinders, name_re, flag)
143 gdb.invalidate_cached_frames()
146 % (total, "" if total == 1 else "s", "enabled" if flag else "disabled")
150 class EnableUnwinder(gdb.Command):
151 """GDB command to enable unwinders.
153 Usage: enable unwinder [LOCUS-REGEXP [NAME-REGEXP]]
155 LOCUS-REGEXP is a regular expression specifying the unwinders to
156 enable. It can 'global', 'progspace', or the name of an objfile
157 within that progspace.
159 NAME_REGEXP is a regular expression to filter unwinder names. If
160 this omitted for a specified locus, then all registered unwinders
161 in the locus are affected."""
164 super(EnableUnwinder, self).__init__("enable unwinder", gdb.COMMAND_STACK)
166 def invoke(self, arg, from_tty):
167 """GDB calls this to perform the command."""
168 do_enable_unwinder(arg, True)
171 class DisableUnwinder(gdb.Command):
172 """GDB command to disable the specified unwinder.
174 Usage: disable unwinder [LOCUS-REGEXP [NAME-REGEXP]]
176 LOCUS-REGEXP is a regular expression specifying the unwinders to
177 disable. It can 'global', 'progspace', or the name of an objfile
178 within that progspace.
180 NAME_REGEXP is a regular expression to filter unwinder names. If
181 this omitted for a specified locus, then all registered unwinders
182 in the locus are affected."""
185 super(DisableUnwinder, self).__init__("disable unwinder", gdb.COMMAND_STACK)
187 def invoke(self, arg, from_tty):
188 """GDB calls this to perform the command."""
189 do_enable_unwinder(arg, False)
192 def register_unwinder_commands():
193 """Installs the unwinder commands."""
199 register_unwinder_commands()