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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#!/usr/bin/env python3
# Copyright (c) 2018-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Be aware that bitcoind and bitcoin-qt differ in terms of localization: Qt
# opts in to POSIX localization by running setlocale(LC_ALL, "") on startup,
# whereas no such call is made in bitcoind.
#
# Qt runs setlocale(LC_ALL, "") on initialization. This installs the locale
# specified by the user's LC_ALL (or LC_*) environment variable as the new
# C locale.
#
# In contrast, bitcoind does not opt in to localization -- no call to
# setlocale(LC_ALL, "") is made and the environment variables LC_* are
# thus ignored.
#
# This results in situations where bitcoind is guaranteed to be running
# with the classic locale ("C") whereas the locale of bitcoin-qt will vary
# depending on the user's environment variables.
#
# An example: Assuming the environment variable LC_ALL=de_DE then the
# call std::to_string(1.23) will return "1.230000" in bitcoind but
# "1,230000" in bitcoin-qt.
#
# From the Qt documentation:
# "On Unix/Linux Qt is configured to use the system locale settings by default.
# This can cause a conflict when using POSIX functions, for instance, when
# converting between data types such as floats and strings, since the notation
# may differ between locales. To get around this problem, call the POSIX function
# setlocale(LC_NUMERIC,"C") right after initializing QApplication, QGuiApplication
# or QCoreApplication to reset the locale that is used for number formatting to
# "C"-locale."
#
# See https://doc.qt.io/qt-5/qcoreapplication.html#locale-settings and
# https://stackoverflow.com/a/34878283 for more details.
import re
import sys
from subprocess import check_output, CalledProcessError
KNOWN_VIOLATIONS = [
"src/dbwrapper.cpp:.*vsnprintf",
"src/test/fuzz/locale.cpp:.*setlocale",
"src/test/util_tests.cpp:.*strtoll",
"src/wallet/bdb.cpp:.*DbEnv::strerror", # False positive
"src/util/syserror.cpp:.*strerror", # Outside this function use `SysErrorString`
]
REGEXP_EXTERNAL_DEPENDENCIES_EXCLUSIONS = [
"src/crypto/ctaes/",
"src/leveldb/",
"src/secp256k1/",
"src/minisketch/",
"src/tinyformat.h",
]
LOCALE_DEPENDENT_FUNCTIONS = [
"alphasort", # LC_COLLATE (via strcoll)
"asctime", # LC_TIME (directly)
"asprintf", # (via vasprintf)
"atof", # LC_NUMERIC (via strtod)
"atoi", # LC_NUMERIC (via strtol)
"atol", # LC_NUMERIC (via strtol)
"atoll", # (via strtoll)
"atoq",
"btowc", # LC_CTYPE (directly)
"ctime", # (via asctime or localtime)
"dprintf", # (via vdprintf)
"fgetwc",
"fgetws",
"fold_case", # boost::locale::fold_case
"fprintf", # (via vfprintf)
"fputwc",
"fputws",
"fscanf", # (via __vfscanf)
"fwprintf", # (via __vfwprintf)
"getdate", # via __getdate_r => isspace // __localtime_r
"getwc",
"getwchar",
"is_digit", # boost::algorithm::is_digit
"is_space", # boost::algorithm::is_space
"isalnum", # LC_CTYPE
"isalpha", # LC_CTYPE
"isblank", # LC_CTYPE
"iscntrl", # LC_CTYPE
"isctype", # LC_CTYPE
"isdigit", # LC_CTYPE
"isgraph", # LC_CTYPE
"islower", # LC_CTYPE
"isprint", # LC_CTYPE
"ispunct", # LC_CTYPE
"isspace", # LC_CTYPE
"isupper", # LC_CTYPE
"iswalnum", # LC_CTYPE
"iswalpha", # LC_CTYPE
"iswblank", # LC_CTYPE
"iswcntrl", # LC_CTYPE
"iswctype", # LC_CTYPE
"iswdigit", # LC_CTYPE
"iswgraph", # LC_CTYPE
"iswlower", # LC_CTYPE
"iswprint", # LC_CTYPE
"iswpunct", # LC_CTYPE
"iswspace", # LC_CTYPE
"iswupper", # LC_CTYPE
"iswxdigit", # LC_CTYPE
"isxdigit", # LC_CTYPE
"localeconv", # LC_NUMERIC + LC_MONETARY
"mblen", # LC_CTYPE
"mbrlen",
"mbrtowc",
"mbsinit",
"mbsnrtowcs",
"mbsrtowcs",
"mbstowcs", # LC_CTYPE
"mbtowc", # LC_CTYPE
"mktime",
"normalize", # boost::locale::normalize
"printf", # LC_NUMERIC
"putwc",
"putwchar",
"scanf", # LC_NUMERIC
"setlocale",
"snprintf",
"sprintf",
"sscanf",
"std::locale::global",
"std::to_string",
"stod",
"stof",
"stoi",
"stol",
"stold",
"stoll",
"stoul",
"stoull",
"strcasecmp",
"strcasestr",
"strcoll", # LC_COLLATE
"strerror",
"strfmon",
"strftime", # LC_TIME
"strncasecmp",
"strptime",
"strtod", # LC_NUMERIC
"strtof",
"strtoimax",
"strtol", # LC_NUMERIC
"strtold",
"strtoll",
"strtoq",
"strtoul", # LC_NUMERIC
"strtoull",
"strtoumax",
"strtouq",
"strxfrm", # LC_COLLATE
"swprintf",
"to_lower", # boost::locale::to_lower
"to_title", # boost::locale::to_title
"to_upper", # boost::locale::to_upper
"tolower", # LC_CTYPE
"toupper", # LC_CTYPE
"towctrans",
"towlower", # LC_CTYPE
"towupper", # LC_CTYPE
"trim", # boost::algorithm::trim
"trim_left", # boost::algorithm::trim_left
"trim_right", # boost::algorithm::trim_right
"ungetwc",
"vasprintf",
"vdprintf",
"versionsort",
"vfprintf",
"vfscanf",
"vfwprintf",
"vprintf",
"vscanf",
"vsnprintf",
"vsprintf",
"vsscanf",
"vswprintf",
"vwprintf",
"wcrtomb",
"wcscasecmp",
"wcscoll", # LC_COLLATE
"wcsftime", # LC_TIME
"wcsncasecmp",
"wcsnrtombs",
"wcsrtombs",
"wcstod", # LC_NUMERIC
"wcstof",
"wcstoimax",
"wcstol", # LC_NUMERIC
"wcstold",
"wcstoll",
"wcstombs", # LC_CTYPE
"wcstoul", # LC_NUMERIC
"wcstoull",
"wcstoumax",
"wcswidth",
"wcsxfrm", # LC_COLLATE
"wctob",
"wctomb", # LC_CTYPE
"wctrans",
"wctype",
"wcwidth",
"wprintf"
]
def find_locale_dependent_function_uses():
regexp_locale_dependent_functions = "|".join(LOCALE_DEPENDENT_FUNCTIONS)
exclude_args = [":(exclude)" + excl for excl in REGEXP_EXTERNAL_DEPENDENCIES_EXCLUSIONS]
git_grep_command = ["git", "grep", "-E", "[^a-zA-Z0-9_\\`'\"<>](" + regexp_locale_dependent_functions + ")(_r|_s)?[^a-zA-Z0-9_\\`'\"<>]", "--", "*.cpp", "*.h"] + exclude_args
git_grep_output = list()
try:
git_grep_output = check_output(git_grep_command, text=True, encoding="utf8").splitlines()
except CalledProcessError as e:
if e.returncode > 1:
raise e
return git_grep_output
def main():
exit_code = 0
regexp_ignore_known_violations = "|".join(KNOWN_VIOLATIONS)
git_grep_output = find_locale_dependent_function_uses()
for locale_dependent_function in LOCALE_DEPENDENT_FUNCTIONS:
matches = [line for line in git_grep_output
if re.search("[^a-zA-Z0-9_\\`'\"<>]" + locale_dependent_function + "(_r|_s)?[^a-zA-Z0-9_\\`'\"<>]", line)
and not re.search("\\.(c|cpp|h):\\s*(//|\\*|/\\*|\").*" + locale_dependent_function, line)
and not re.search(regexp_ignore_known_violations, line)]
if matches:
print(f"The locale dependent function {locale_dependent_function}(...) appears to be used:")
for match in matches:
print(match)
print("")
exit_code = 1
if exit_code == 1:
print("Unnecessary locale dependence can cause bugs that are very tricky to isolate and fix. Please avoid using locale-dependent functions if possible.\n")
print(f"Advice not applicable in this specific case? Add an exception by updating the ignore list in {sys.argv[0]}")
sys.exit(exit_code)
if __name__ == "__main__":
main()
|
