2 # Copyright 2015-2019 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]
52 return (validate_regexp(locus_regexp, "locus"),
53 validate_regexp(name_regexp, "unwinder"))
56 class InfoUnwinder(gdb.Command):
57 """GDB command to list unwinders.
59 Usage: info unwinder [LOCUS-REGEXP [NAME-REGEXP]]
61 LOCUS-REGEXP is a regular expression matching the location of the
62 unwinder. If it is omitted, all registered unwinders from all
63 loci are listed. A locus can be 'global', 'progspace' to list
64 the unwinders from the current progspace, or a regular expression
65 matching filenames of objfiles.
67 NAME-REGEXP is a regular expression to filter unwinder names. If
68 this omitted for a specified locus, then all registered unwinders
69 in the locus are listed."""
72 super(InfoUnwinder, self).__init__("info unwinder",
75 def list_unwinders(self, title, unwinders, name_re):
76 """Lists the unwinders whose name matches regexp.
79 title: The line to print before the list.
80 unwinders: The list of the unwinders.
81 name_re: unwinder name filter.
86 for unwinder in unwinders:
87 if name_re.match(unwinder.name):
88 print(" %s%s" % (unwinder.name,
89 "" if unwinder.enabled else " [disabled]"))
91 def invoke(self, arg, from_tty):
92 locus_re, name_re = parse_unwinder_command_args(arg)
93 if locus_re.match("global"):
94 self.list_unwinders("Global:", gdb.frame_unwinders,
96 if locus_re.match("progspace"):
97 cp = gdb.current_progspace()
98 self.list_unwinders("Progspace %s:" % cp.filename,
99 cp.frame_unwinders, name_re)
100 for objfile in gdb.objfiles():
101 if locus_re.match(objfile.filename):
102 self.list_unwinders("Objfile %s:" % objfile.filename,
103 objfile.frame_unwinders, name_re)
106 def do_enable_unwinder1(unwinders, name_re, flag):
107 """Enable/disable unwinders whose names match given regex.
110 unwinders: The list of unwinders.
111 name_re: Unwinder name filter.
112 flag: Enable/disable.
115 The number of unwinders affected.
118 for unwinder in unwinders:
119 if name_re.match(unwinder.name):
120 unwinder.enabled = flag
125 def do_enable_unwinder(arg, flag):
126 """Enable/disable unwinder(s)."""
127 (locus_re, name_re) = parse_unwinder_command_args(arg)
129 if locus_re.match("global"):
130 total += do_enable_unwinder1(gdb.frame_unwinders, name_re, flag)
131 if locus_re.match("progspace"):
132 total += do_enable_unwinder1(gdb.current_progspace().frame_unwinders,
134 for objfile in gdb.objfiles():
135 if locus_re.match(objfile.filename):
136 total += do_enable_unwinder1(objfile.frame_unwinders, name_re,
139 gdb.invalidate_cached_frames()
140 print("%d unwinder%s %s" % (total, "" if total == 1 else "s",
141 "enabled" if flag else "disabled"))
144 class EnableUnwinder(gdb.Command):
145 """GDB command to enable unwinders.
147 Usage: enable unwinder [LOCUS-REGEXP [NAME-REGEXP]]
149 LOCUS-REGEXP is a regular expression specifying the unwinders to
150 enable. It can 'global', 'progspace', or the name of an objfile
151 within that progspace.
153 NAME_REGEXP is a regular expression to filter unwinder names. If
154 this omitted for a specified locus, then all registered unwinders
155 in the locus are affected."""
158 super(EnableUnwinder, self).__init__("enable unwinder",
161 def invoke(self, arg, from_tty):
162 """GDB calls this to perform the command."""
163 do_enable_unwinder(arg, True)
166 class DisableUnwinder(gdb.Command):
167 """GDB command to disable the specified unwinder.
169 Usage: disable unwinder [LOCUS-REGEXP [NAME-REGEXP]]
171 LOCUS-REGEXP is a regular expression specifying the unwinders to
172 disable. It can 'global', 'progspace', or the name of an objfile
173 within that progspace.
175 NAME_REGEXP is a regular expression to filter unwinder names. If
176 this omitted for a specified locus, then all registered unwinders
177 in the locus are affected."""
180 super(DisableUnwinder, self).__init__("disable unwinder",
183 def invoke(self, arg, from_tty):
184 """GDB calls this to perform the command."""
185 do_enable_unwinder(arg, False)
188 def register_unwinder_commands():
189 """Installs the unwinder commands."""
195 register_unwinder_commands()