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
|
#!/usr/bin/env python3
#
# cppcheck addon for Y2038 safeness detection
#
# Detects:
#
# 1. _TIME_BITS being defined to something else than 64 bits
# 2. _USE_TIME_BITS64 being defined when _TIME_BITS is not
# 3. Any Y2038-unsafe symbol when _USE_TIME_BITS64 is not defined.
#
# Example usage:
# $ cppcheck --addon=y2038 path-to-src/test.c
#
from __future__ import print_function
import cppcheckdata
import sys
import re
# --------------------------------------------
# #define/#undef detection regular expressions
# --------------------------------------------
# test for '#define _TIME_BITS 64'
re_define_time_bits_64 = re.compile(r'^\s*#\s*define\s+_TIME_BITS\s+64\s*$')
# test for '#define _TIME_BITS ...' (combine w/ above to test for 'not 64')
re_define_time_bits = re.compile(r'^\s*#\s*define\s+_TIME_BITS\s+.*$')
# test for '#undef _TIME_BITS' (if it ever happens)
re_undef_time_bits = re.compile(r'^\s*#\s*undef\s+_TIME_BITS\s*$')
# test for '#define _USE_TIME_BITS64'
re_define_use_time_bits64 = re.compile(r'^\s*#\s*define\s+_USE_TIME_BITS64\s*$')
# test for '#undef _USE_TIME_BITS64' (if it ever happens)
re_undef_use_time_bits64 = re.compile(r'^\s*#\s*undef\s+_USE_TIME_BITS64\s*$')
# --------------------------------
# List of Y2038-unsafe identifiers
# --------------------------------
# This is WIP. Eventually it should contain all identifiers (types
# and functions) which would be affected by the Y2038 bug.
id_Y2038 = {
# Y2038-unsafe types by definition
'time_t'
# Types using Y2038-unsafe types
'lastlog',
'msqid_ds',
'semid_ds',
'timeb',
'timespec',
'timeval',
'utimbuf',
'itimerspec',
'clnt_ops',
'elf_prstatus',
'itimerval',
'ntptimeval',
'rusage',
'timex',
'utmp',
'utmpx',
# APIs using 2038-unsafe types
'ctime',
'ctime_r',
'difftime',
'gmtime',
'gmtime_r',
'localtime',
'localtime_r',
'mktime',
'stime',
'timegm',
'timelocal',
'time',
'msgctl',
'ftime',
'aio_suspend',
'clock_getres',
'clock_gettime',
'clock_nanosleep',
'clock_settime',
'futimens',
'mq_timedreceive',
'mq_timedsend',
'nanosleep',
'pselect',
'pthread_cond_timedwait',
'pthread_mutex_timedlock',
'pthread_rwlock_timedrdlock',
'pthread_rwlock_timedwrlock',
'sched_rr_get_interval',
'sem_timedwait',
'sigtimedwait',
'timespec_get',
'utimensat',
'adjtime',
'pmap_rmtcall',
'clntudp_bufcreate',
'clntudp_create',
'futimes',
'gettimeofday',
'lutimes',
'select',
'settimeofday',
'utimes',
'utime',
'timerfd_gettime',
'timerfd_settime',
'timer_gettime',
'timer_settime',
'fstatat',
'fstat',
'__fxstatat',
'__fxstat',
'lstat',
'__lxstat',
'stat',
'__xstat',
'struct itimerval',
'setitimer',
'getitimer',
'ntp_gettime',
'getrusage',
'wait3',
'wait4',
'adjtimex',
'ntp_adjtime',
'getutent_r',
'getutent',
'getutid_r',
'getutid',
'getutline_r',
'getutline',
'login',
'pututline',
'updwtmp',
'getutxent',
'getutxid',
'getutxline',
'pututxline'
}
def check_y2038_safe(dumpfile, quiet=False):
# Assume that the code is Y2038 safe until proven otherwise
y2038safe = True
# load XML from .dump file
data = cppcheckdata.CppcheckData(dumpfile)
srcfile = data.files[0]
for cfg in data.iterconfigurations():
if not quiet:
print('Checking %s, config %s...' % (srcfile, cfg.name))
safe_ranges = []
safe = -1
time_bits_defined = False
srclinenr = 0
for directive in cfg.directives:
# track source line number
if directive.file == srcfile:
srclinenr = directive.linenr
# check for correct _TIME_BITS if present
if re_define_time_bits_64.match(directive.str):
time_bits_defined = True
elif re_define_time_bits.match(directive.str):
cppcheckdata.reportError(directive, 'error',
'_TIME_BITS must be defined equal to 64',
'y2038',
'type-bits-not-64')
time_bits_defined = False
y2038safe = False
elif re_undef_time_bits.match(directive.str):
time_bits_defined = False
# check for _USE_TIME_BITS64 (un)definition
if re_define_use_time_bits64.match(directive.str):
safe = int(srclinenr)
# warn about _TIME_BITS not being defined
if not time_bits_defined:
cppcheckdata.reportError(directive, 'warning',
'_USE_TIME_BITS64 is defined but _TIME_BITS was not',
'y2038',
'type-bits-undef')
elif re_undef_use_time_bits64.match(directive.str):
unsafe = int(srclinenr)
# do we have a safe..unsafe area?
if unsafe > safe > 0:
safe_ranges.append((safe, unsafe))
safe = -1
# check end of source beyond last directive
if len(cfg.tokenlist) > 0:
unsafe = int(cfg.tokenlist[-1].linenr)
if unsafe > safe > 0:
safe_ranges.append((safe, unsafe))
# go through all tokens
for token in cfg.tokenlist:
if token.str in id_Y2038:
if not any(lower <= int(token.linenr) <= upper
for (lower, upper) in safe_ranges):
cppcheckdata.reportError(token, 'warning',
token.str + ' is Y2038-unsafe',
'y2038',
'unsafe-call')
y2038safe = False
token = token.next
return y2038safe
def get_args_parser():
parser = cppcheckdata.ArgumentParser()
return parser
if __name__ == '__main__':
parser = get_args_parser()
args = parser.parse_args()
exit_code = 0
quiet = args.quiet or args.cli
if not args.dumpfile:
if not args.quiet:
print("no input files.")
sys.exit(0)
for dumpfile in args.dumpfile:
if not quiet:
print('Checking ' + dumpfile + '...')
check_y2038_safe(dumpfile, quiet)
sys.exit(cppcheckdata.EXIT_CODE)
|
