/usr/share/gdb/python/gdb/prompt.py is in gdb 7.7-0ubuntu3.
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 | # Extended prompt utilities.
# Copyright (C) 2011-2014 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/>.
""" Extended prompt library functions."""
import gdb
import os
def _prompt_pwd(ignore):
"The current working directory."
return os.getcwdu()
def _prompt_object_attr(func, what, attr, nattr):
"""Internal worker for fetching GDB attributes."""
if attr is None:
attr = nattr
try:
obj = func()
except gdb.error:
return '<no %s>' % what
if hasattr(obj, attr):
result = getattr(obj, attr)
if callable(result):
result = result()
return result
else:
return '<no attribute %s on current %s>' % (attr, what)
def _prompt_frame(attr):
"The selected frame; an argument names a frame parameter."
return _prompt_object_attr(gdb.selected_frame, 'frame', attr, 'name')
def _prompt_thread(attr):
"The selected thread; an argument names a thread parameter."
return _prompt_object_attr(gdb.selected_thread, 'thread', attr, 'num')
def _prompt_version(attr):
"The version of GDB."
return gdb.VERSION
def _prompt_esc(attr):
"The ESC character."
return '\033'
def _prompt_bs(attr):
"A backslash."
return '\\'
def _prompt_n(attr):
"A newline."
return '\n'
def _prompt_r(attr):
"A carriage return."
return '\r'
def _prompt_param(attr):
"A parameter's value; the argument names the parameter."
return gdb.parameter(attr)
def _prompt_noprint_begin(attr):
"Begins a sequence of non-printing characters."
return '\001'
def _prompt_noprint_end(attr):
"Ends a sequence of non-printing characters."
return '\002'
prompt_substitutions = {
'e': _prompt_esc,
'\\': _prompt_bs,
'n': _prompt_n,
'r': _prompt_r,
'v': _prompt_version,
'w': _prompt_pwd,
'f': _prompt_frame,
't': _prompt_thread,
'p': _prompt_param,
'[': _prompt_noprint_begin,
']': _prompt_noprint_end
}
def prompt_help():
"""Generate help dynamically from the __doc__ strings of attribute
functions."""
result = ''
keys = sorted (prompt_substitutions.keys())
for key in keys:
result += ' \\%s\t%s\n' % (key, prompt_substitutions[key].__doc__)
result += """
A substitution can be used in a simple form, like "\\f".
An argument can also be passed to it, like "\\f{name}".
The meaning of the argument depends on the particular substitution."""
return result
def substitute_prompt(prompt):
"Perform substitutions on PROMPT."
result = ''
plen = len(prompt)
i = 0
while i < plen:
if prompt[i] == '\\':
i = i + 1
if i >= plen:
break
cmdch = prompt[i]
if cmdch in prompt_substitutions:
cmd = prompt_substitutions[cmdch]
if i + 1 < plen and prompt[i + 1] == '{':
j = i + 1
while j < plen and prompt[j] != '}':
j = j + 1
# Just ignore formatting errors.
if j >= plen or prompt[j] != '}':
arg = None
else:
arg = prompt[i + 2 : j]
i = j
else:
arg = None
result += str(cmd(arg))
else:
# Unrecognized escapes are turned into the escaped
# character itself.
result += prompt[i]
else:
result += prompt[i]
i = i + 1
return result
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