2 * Copyright (C) 2009 Dan Carpenter.
3 * Copyright (C) 2019 Oracle.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
22 #include "smatch_extra.h"
23 #include "smatch_slist.h"
49 const char *get_lock_name(enum lock_type type
)
51 static const char *names
[] = {
52 [spin_lock
] = "spin_lock",
53 [read_lock
] = "read_lock",
54 [write_lock
] = "write_lock",
56 [bottom_half
] = "bottom_half",
59 [prepare_lock
] = "prepare_lock",
60 [enable_lock
] = "enable_lock",
62 [rcu_read
] = "rcu_read",
77 const sval_t
*implies_start
, *implies_end
;
81 static struct lock_info lock_table
[] = {
82 {"spin_lock", LOCK
, spin_lock
, 0, "$"},
83 {"spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
84 {"spin_lock_nested", LOCK
, spin_lock
, 0, "$"},
85 {"_spin_lock", LOCK
, spin_lock
, 0, "$"},
86 {"_spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
87 {"_spin_lock_nested", LOCK
, spin_lock
, 0, "$"},
88 {"__spin_lock", LOCK
, spin_lock
, 0, "$"},
89 {"__spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
90 {"__spin_lock_nested", LOCK
, spin_lock
, 0, "$"},
91 {"raw_spin_lock", LOCK
, spin_lock
, 0, "$"},
92 {"raw_spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
93 {"_raw_spin_lock", LOCK
, spin_lock
, 0, "$"},
94 {"_raw_spin_lock_nested", LOCK
, spin_lock
, 0, "$"},
95 {"_raw_spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
96 {"__raw_spin_lock", LOCK
, spin_lock
, 0, "$"},
97 {"__raw_spin_unlock", UNLOCK
, spin_lock
, 0, "$"},
99 {"spin_lock_irq", LOCK
, spin_lock
, 0, "$"},
100 {"spin_unlock_irq", UNLOCK
, spin_lock
, 0, "$"},
101 {"_spin_lock_irq", LOCK
, spin_lock
, 0, "$"},
102 {"_spin_unlock_irq", UNLOCK
, spin_lock
, 0, "$"},
103 {"__spin_lock_irq", LOCK
, spin_lock
, 0, "$"},
104 {"__spin_unlock_irq", UNLOCK
, spin_lock
, 0, "$"},
105 {"_raw_spin_lock_irq", LOCK
, spin_lock
, 0, "$"},
106 {"_raw_spin_unlock_irq", UNLOCK
, spin_lock
, 0, "$"},
107 {"__raw_spin_unlock_irq", UNLOCK
, spin_lock
, 0, "$"},
108 {"spin_lock_irqsave", LOCK
, spin_lock
, 0, "$"},
109 {"spin_unlock_irqrestore", UNLOCK
, spin_lock
, 0, "$"},
110 {"_spin_lock_irqsave", LOCK
, spin_lock
, 0, "$"},
111 {"_spin_unlock_irqrestore", UNLOCK
, spin_lock
, 0, "$"},
112 {"__spin_lock_irqsave", LOCK
, spin_lock
, 0, "$"},
113 {"__spin_unlock_irqrestore", UNLOCK
, spin_lock
, 0, "$"},
114 {"_raw_spin_lock_irqsave", LOCK
, spin_lock
, 0, "$"},
115 {"_raw_spin_unlock_irqrestore", UNLOCK
, spin_lock
, 0, "$"},
116 {"__raw_spin_lock_irqsave", LOCK
, spin_lock
, 0, "$"},
117 {"__raw_spin_unlock_irqrestore", UNLOCK
, spin_lock
, 0, "$"},
118 {"spin_lock_irqsave_nested", LOCK
, spin_lock
, 0, "$"},
119 {"_spin_lock_irqsave_nested", LOCK
, spin_lock
, 0, "$"},
120 {"__spin_lock_irqsave_nested", LOCK
, spin_lock
, 0, "$"},
121 {"_raw_spin_lock_irqsave_nested", LOCK
, spin_lock
, 0, "$"},
122 {"spin_lock_bh", LOCK
, spin_lock
, 0, "$"},
123 {"spin_unlock_bh", UNLOCK
, spin_lock
, 0, "$"},
124 {"_spin_lock_bh", LOCK
, spin_lock
, 0, "$"},
125 {"_spin_unlock_bh", UNLOCK
, spin_lock
, 0, "$"},
126 {"__spin_lock_bh", LOCK
, spin_lock
, 0, "$"},
127 {"__spin_unlock_bh", UNLOCK
, spin_lock
, 0, "$"},
129 {"spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
130 {"_spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
131 {"__spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
132 {"raw_spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
133 {"_raw_spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
134 {"spin_trylock_irq", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
135 {"spin_trylock_irqsave", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
136 {"spin_trylock_bh", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
137 {"_spin_trylock_bh", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
138 {"__spin_trylock_bh", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
139 {"__raw_spin_trylock", LOCK
, spin_lock
, 0, "$", &int_one
, &int_one
},
140 {"_atomic_dec_and_lock", LOCK
, spin_lock
, 1, "$", &int_one
, &int_one
},
142 {"read_lock", LOCK
, read_lock
, 0, "$"},
143 {"down_read", LOCK
, read_lock
, 0, "$"},
144 {"down_read_nested", LOCK
, read_lock
, 0, "$"},
145 {"down_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
146 {"down_read_killable", LOCK
, read_lock
, 0, "$", &int_zero
, &int_zero
},
147 {"up_read", UNLOCK
, read_lock
, 0, "$"},
148 {"read_unlock", UNLOCK
, read_lock
, 0, "$"},
149 {"_read_lock", LOCK
, read_lock
, 0, "$"},
150 {"_read_unlock", UNLOCK
, read_lock
, 0, "$"},
151 {"__read_lock", LOCK
, read_lock
, 0, "$"},
152 {"__read_unlock", UNLOCK
, read_lock
, 0, "$"},
153 {"_raw_read_lock", LOCK
, read_lock
, 0, "$"},
154 {"_raw_read_unlock", UNLOCK
, read_lock
, 0, "$"},
155 {"__raw_read_lock", LOCK
, read_lock
, 0, "$"},
156 {"__raw_read_unlock", UNLOCK
, read_lock
, 0, "$"},
157 {"read_lock_irq", LOCK
, read_lock
, 0, "$"},
158 {"read_unlock_irq" , UNLOCK
, read_lock
, 0, "$"},
159 {"_read_lock_irq", LOCK
, read_lock
, 0, "$"},
160 {"_read_unlock_irq", UNLOCK
, read_lock
, 0, "$"},
161 {"__read_lock_irq", LOCK
, read_lock
, 0, "$"},
162 {"__read_unlock_irq", UNLOCK
, read_lock
, 0, "$"},
163 {"_raw_read_unlock_irq", UNLOCK
, read_lock
, 0, "$"},
164 {"_raw_read_lock_irq", LOCK
, read_lock
, 0, "$"},
165 {"_raw_read_lock_bh", LOCK
, read_lock
, 0, "$"},
166 {"_raw_read_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
167 {"read_lock_irqsave", LOCK
, read_lock
, 0, "$"},
168 {"read_unlock_irqrestore", UNLOCK
, read_lock
, 0, "$"},
169 {"_read_lock_irqsave", LOCK
, read_lock
, 0, "$"},
170 {"_read_unlock_irqrestore", UNLOCK
, read_lock
, 0, "$"},
171 {"__read_lock_irqsave", LOCK
, read_lock
, 0, "$"},
172 {"__read_unlock_irqrestore", UNLOCK
, read_lock
, 0, "$"},
173 {"read_lock_bh", LOCK
, read_lock
, 0, "$"},
174 {"read_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
175 {"_read_lock_bh", LOCK
, read_lock
, 0, "$"},
176 {"_read_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
177 {"__read_lock_bh", LOCK
, read_lock
, 0, "$"},
178 {"__read_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
179 {"__raw_read_lock_bh", LOCK
, read_lock
, 0, "$"},
180 {"__raw_read_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
182 {"_raw_read_lock_irqsave", LOCK
, read_lock
, 0, "$"},
183 {"_raw_read_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
184 {"_raw_read_unlock_irqrestore", UNLOCK
, read_lock
, 0, "$"},
185 {"_raw_read_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
186 {"_raw_spin_lock_bh", LOCK
, read_lock
, 0, "$"},
187 {"_raw_spin_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
188 {"_raw_spin_lock_nest_lock", LOCK
, read_lock
, 0, "$"},
189 {"_raw_spin_unlock_bh", UNLOCK
, read_lock
, 0, "$"},
190 {"_raw_spin_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
191 {"_raw_write_lock_irqsave", LOCK
, write_lock
, 0, "$"},
192 {"_raw_write_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
193 {"_raw_write_unlock_irqrestore", UNLOCK
, write_lock
, 0, "$"},
194 {"_raw_write_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
195 {"__raw_write_unlock_irq", UNLOCK
, write_lock
, 0, "$"},
196 {"__raw_write_unlock_irq", UNLOCK
, irq
, 0, "irq"},
197 {"__raw_write_unlock_irqrestore", UNLOCK
, write_lock
, 0, "$"},
198 {"__raw_write_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
200 {"generic__raw_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
201 {"read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
202 {"_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
203 {"raw_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
204 {"_raw_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
205 {"__raw_read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
206 {"__read_trylock", LOCK
, read_lock
, 0, "$", &int_one
, &int_one
},
208 {"write_lock", LOCK
, write_lock
, 0, "$"},
209 {"down_write", LOCK
, write_lock
, 0, "$"},
210 {"down_write_nested", LOCK
, write_lock
, 0, "$"},
211 {"up_write", UNLOCK
, write_lock
, 0, "$"},
212 {"write_unlock", UNLOCK
, write_lock
, 0, "$"},
213 {"_write_lock", LOCK
, write_lock
, 0, "$"},
214 {"_write_unlock", UNLOCK
, write_lock
, 0, "$"},
215 {"__write_lock", LOCK
, write_lock
, 0, "$"},
216 {"__write_unlock", UNLOCK
, write_lock
, 0, "$"},
217 {"write_lock_irq", LOCK
, write_lock
, 0, "$"},
218 {"write_unlock_irq", UNLOCK
, write_lock
, 0, "$"},
219 {"_write_lock_irq", LOCK
, write_lock
, 0, "$"},
220 {"_write_unlock_irq", UNLOCK
, write_lock
, 0, "$"},
221 {"__write_lock_irq", LOCK
, write_lock
, 0, "$"},
222 {"__write_unlock_irq", UNLOCK
, write_lock
, 0, "$"},
223 {"_raw_write_unlock_irq", UNLOCK
, write_lock
, 0, "$"},
224 {"write_lock_irqsave", LOCK
, write_lock
, 0, "$"},
225 {"write_unlock_irqrestore", UNLOCK
, write_lock
, 0, "$"},
226 {"_write_lock_irqsave", LOCK
, write_lock
, 0, "$"},
227 {"_write_unlock_irqrestore", UNLOCK
, write_lock
, 0, "$"},
228 {"__write_lock_irqsave", LOCK
, write_lock
, 0, "$"},
229 {"__write_unlock_irqrestore", UNLOCK
, write_lock
, 0, "$"},
230 {"write_lock_bh", LOCK
, write_lock
, 0, "$"},
231 {"write_unlock_bh", UNLOCK
, write_lock
, 0, "$"},
232 {"_write_lock_bh", LOCK
, write_lock
, 0, "$"},
233 {"_write_unlock_bh", UNLOCK
, write_lock
, 0, "$"},
234 {"__write_lock_bh", LOCK
, write_lock
, 0, "$"},
235 {"__write_unlock_bh", UNLOCK
, write_lock
, 0, "$"},
236 {"_raw_write_lock", LOCK
, write_lock
, 0, "$"},
237 {"__raw_write_lock", LOCK
, write_lock
, 0, "$"},
238 {"_raw_write_unlock", UNLOCK
, write_lock
, 0, "$"},
239 {"__raw_write_unlock", UNLOCK
, write_lock
, 0, "$"},
240 {"_raw_write_lock_bh", LOCK
, write_lock
, 0, "$"},
241 {"_raw_write_unlock_bh", UNLOCK
, write_lock
, 0, "$"},
242 {"_raw_write_lock_irq", LOCK
, write_lock
, 0, "$"},
244 {"write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
245 {"_write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
246 {"raw_write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
247 {"_raw_write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
248 {"__write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
249 {"__raw_write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
250 {"down_write_trylock", LOCK
, write_lock
, 0, "$", &int_one
, &int_one
},
251 {"down_write_killable", LOCK
, write_lock
, 0, "$", &int_zero
, &int_zero
},
253 {"down", LOCK
, sem
, 0, "$"},
254 {"up", UNLOCK
, sem
, 0, "$"},
255 {"down_trylock", LOCK
, sem
, 0, "$", &int_zero
, &int_zero
},
256 {"down_timeout", LOCK
, sem
, 0, "$", &int_zero
, &int_zero
},
257 {"down_interruptible", LOCK
, sem
, 0, "$", &int_zero
, &int_zero
},
258 {"down_killable", LOCK
, sem
, 0, "$", &int_zero
, &int_zero
},
261 {"mutex_lock", LOCK
, mutex
, 0, "$"},
262 {"mutex_unlock", UNLOCK
, mutex
, 0, "$"},
263 {"mutex_destroy", RESTORE
, mutex
, 0, "$"},
264 {"mutex_lock_nested", LOCK
, mutex
, 0, "$"},
265 {"mutex_lock_io", LOCK
, mutex
, 0, "$"},
266 {"mutex_lock_io_nested", LOCK
, mutex
, 0, "$"},
268 {"mutex_lock_interruptible", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
269 {"mutex_lock_interruptible_nested", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
270 {"mutex_lock_killable", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
271 {"mutex_lock_killable_nested", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
273 {"mutex_trylock", LOCK
, mutex
, 0, "$", &int_one
, &int_one
},
275 {"ww_mutex_lock", LOCK
, mutex
, 0, "$"},
276 {"__ww_mutex_lock", LOCK
, mutex
, 0, "$"},
277 {"ww_mutex_lock_interruptible", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
278 {"ww_mutex_unlock", UNLOCK
, mutex
, 0, "$"},
280 {"raw_local_irq_disable", LOCK
, irq
, NO_ARG
, "irq"},
281 {"raw_local_irq_enable", UNLOCK
, irq
, NO_ARG
, "irq"},
282 {"spin_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
283 {"spin_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
284 {"_spin_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
285 {"_spin_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
286 {"__spin_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
287 {"__spin_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
288 {"_raw_spin_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
289 {"_raw_spin_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
290 {"__raw_spin_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
291 {"spin_trylock_irq", LOCK
, irq
, NO_ARG
, "irq", &int_one
, &int_one
},
292 {"read_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
293 {"read_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
294 {"_read_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
295 {"_read_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
296 {"__read_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
297 {"_raw_read_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
298 {"__read_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
299 {"_raw_read_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
300 {"write_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
301 {"write_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
302 {"_write_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
303 {"_write_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
304 {"__write_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
305 {"__write_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
306 {"_raw_write_lock_irq", LOCK
, irq
, NO_ARG
, "irq"},
307 {"_raw_write_unlock_irq", UNLOCK
, irq
, NO_ARG
, "irq"},
309 {"arch_local_irq_save", LOCK
, irq
, RETURN_VAL
, "$"},
310 {"arch_local_irq_restore", RESTORE
, irq
, 0, "$"},
311 {"__raw_local_irq_save", LOCK
, irq
, RETURN_VAL
, "$"},
312 {"raw_local_irq_restore", RESTORE
, irq
, 0, "$"},
313 {"spin_lock_irqsave_nested", LOCK
, irq
, RETURN_VAL
, "$"},
314 {"spin_lock_irqsave", LOCK
, irq
, 1, "$"},
315 {"spin_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
316 {"_spin_lock_irqsave_nested", LOCK
, irq
, RETURN_VAL
, "$"},
317 {"_spin_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
318 {"_spin_lock_irqsave", LOCK
, irq
, 1, "$"},
319 {"_spin_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
320 {"__spin_lock_irqsave_nested", LOCK
, irq
, 1, "$"},
321 {"__spin_lock_irqsave", LOCK
, irq
, 1, "$"},
322 {"__spin_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
323 {"_raw_spin_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
324 {"_raw_spin_lock_irqsave", LOCK
, irq
, 1, "$"},
325 {"_raw_spin_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
326 {"__raw_spin_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
327 {"__raw_spin_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
328 {"_raw_spin_lock_irqsave_nested", LOCK
, irq
, RETURN_VAL
, "$"},
329 {"spin_trylock_irqsave", LOCK
, irq
, 1, "$", &int_one
, &int_one
},
330 {"read_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
331 {"read_lock_irqsave", LOCK
, irq
, 1, "$"},
332 {"read_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
333 {"_read_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
334 {"_read_lock_irqsave", LOCK
, irq
, 1, "$"},
335 {"_read_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
336 {"__read_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
337 {"__read_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
338 {"write_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
339 {"write_lock_irqsave", LOCK
, irq
, 1, "$"},
340 {"write_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
341 {"_write_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
342 {"_write_lock_irqsave", LOCK
, irq
, 1, "$"},
343 {"_write_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
344 {"__write_lock_irqsave", LOCK
, irq
, RETURN_VAL
, "$"},
345 {"__write_unlock_irqrestore", RESTORE
, irq
, 1, "$"},
347 {"local_bh_disable", LOCK
, bottom_half
, NO_ARG
, "bh"},
348 {"_local_bh_disable", LOCK
, bottom_half
, NO_ARG
, "bh"},
349 {"__local_bh_disable", LOCK
, bottom_half
, NO_ARG
, "bh"},
350 {"local_bh_enable", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
351 {"_local_bh_enable", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
352 {"__local_bh_enable", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
353 {"spin_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
354 {"spin_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
355 {"_spin_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
356 {"_spin_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
357 {"__spin_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
358 {"__spin_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
359 {"read_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
360 {"read_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
361 {"_read_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
362 {"_read_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
363 {"__read_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
364 {"__read_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
365 {"_raw_read_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
366 {"_raw_read_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
367 {"write_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
368 {"write_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
369 {"_write_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
370 {"_write_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
371 {"__write_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
372 {"__write_unlock_bh", UNLOCK
, bottom_half
, NO_ARG
, "bh"},
373 {"_raw_write_lock_bh", LOCK
, bottom_half
, NO_ARG
, "bh"},
374 {"_raw_write_unlock_bh",UNLOCK
, bottom_half
, NO_ARG
, "bh"},
375 {"spin_trylock_bh", LOCK
, bottom_half
, NO_ARG
, "bh", &int_one
, &int_one
},
376 {"_spin_trylock_bh", LOCK
, bottom_half
, NO_ARG
, "bh", &int_one
, &int_one
},
377 {"__spin_trylock_bh", LOCK
, bottom_half
, NO_ARG
, "bh", &int_one
, &int_one
},
379 {"ffs_mutex_lock", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
381 {"clk_prepare_lock", LOCK
, prepare_lock
, NO_ARG
, "clk"},
382 {"clk_prepare_unlock", UNLOCK
, prepare_lock
, NO_ARG
, "clk"},
383 {"clk_enable_lock", LOCK
, enable_lock
, -1, "$"},
384 {"clk_enable_unlock", UNLOCK
, enable_lock
, 0, "$"},
386 {"dma_resv_lock", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
387 {"dma_resv_trylock", LOCK
, mutex
, 0, "$", &int_one
, &int_one
},
388 {"dma_resv_lock_interruptible", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
389 {"dma_resv_unlock", UNLOCK
, mutex
, 0, "$"},
391 {"modeset_lock", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
392 {"drm_ modeset_lock", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
393 {"drm_modeset_lock_single_interruptible", LOCK
, mutex
, 0, "$", &int_zero
, &int_zero
},
394 {"modeset_unlock", UNLOCK
, mutex
, 0, "$"},
395 // {"nvkm_i2c_aux_acquire", LOCK, mutex,
396 {"i915_gem_object_lock_interruptible", LOCK
, mutex
, 0, "$->base.resv", &int_zero
, &int_zero
},
397 {"i915_gem_object_lock", LOCK
, mutex
, 0, "$->base.resv"},
398 {"msm_gem_lock", LOCK
, mutex
, 0, "$->resv"},
400 {"reiserfs_write_lock_nested", LOCK
, mutex
, 0, "$"},
401 {"reiserfs_write_unlock_nested", UNLOCK
, mutex
, 0, "$"},
403 {"rw_lock", LOCK
, write_lock
, 1, "$"},
404 {"rw_unlock", UNLOCK
, write_lock
, 1, "$"},
406 {"sem_lock", LOCK
, mutex
, 0, "$"},
407 {"sem_unlock", UNLOCK
, mutex
, 0, "$"},
409 {"rcu_lock_acquire", LOCK
, rcu
, NO_ARG
, "rcu"},
410 {"rcu_lock_release", UNLOCK
, rcu
, NO_ARG
, "rcu"},
412 {"rcu_read_lock", LOCK
, rcu_read
, NO_ARG
, "rcu_read"},
413 {"rcu_read_unlock", UNLOCK
, rcu_read
, NO_ARG
, "rcu_read"},
414 {"rcu_read_lock_bh", LOCK
, rcu_read
, NO_ARG
, "rcu_read"},
415 {"rcu_read_unlock_bh", UNLOCK
, rcu_read
, NO_ARG
, "rcu_read"},
417 {"rcu_read_lock_sched", LOCK
, rcu_read
, NO_ARG
, "rcu_read"},
418 {"rcu_read_lock_sched_notrace", LOCK
, rcu_read
, NO_ARG
, "rcu_read"},
419 {"rcu_read_unlock_sched", UNLOCK
, rcu_read
, NO_ARG
, "rcu_read"},
420 {"rcu_read_unlock_sched_notrace", UNLOCK
, rcu_read
, NO_ARG
, "rcu_read"},
422 {"gfs2_trans_begin", LOCK
, sem
, 0, "&$->sd_log_flush_lock", &int_zero
, &int_zero
},
424 {"lock_sock", LOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
425 {"lock_sock_nested", LOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
426 {"lock_sock_fast", LOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
427 {"__lock_sock", LOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
428 {"release_sock", UNLOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
429 {"__release_sock", UNLOCK
, spin_lock
, 0, "&$->sk_lock.slock"},
431 {"lock_task_sighand", LOCK
, spin_lock
, 0, "&$->sighand->siglock", &valid_ptr_min_sval
, &valid_ptr_max_sval
},
433 {"rcu_nocb_unlock_irqrestore", RESTORE
, spin_lock
, 0, "&$->nocb_lock"},
434 {"rcu_nocb_unlock_irqrestore", RESTORE
, irq
, 1, "$" },
436 {"bch_write_bdev_super", IGNORE_LOCK
, sem
, 0, "&$->sb_write_mutex"},
437 {"dlfb_set_video_mode", IGNORE_LOCK
, sem
, 0, "&$->urbs.limit_sem"},
439 {"efx_rwsem_assert_write_locked", IGNORE_LOCK
, sem
, 0, "&"},
441 // The i915_gem_ww_ctx_unlock_all() is too complicated
442 {"i915_gem_object_pin_pages_unlocked", IGNORE_LOCK
, mutex
, 0, "$->base.resv"},
443 {"i915_gem_object_pin_map_unlocked", IGNORE_LOCK
, mutex
, 0, "$->base.resv"},
444 {"i915_gem_object_fill_blt", IGNORE_LOCK
, mutex
, 0, "$->base.resv"},
445 {"i915_vma_pin", IGNORE_LOCK
, mutex
, 0, "$->base.resv"},
447 { "perf_event_period", IGNORE_LOCK
, mutex
, 0, "&$->ctx->mutex"},
448 { "perf_event_enable", IGNORE_LOCK
, mutex
, 0, "&$->ctx->mutex"},
450 { "deactivate_locked_super", UNLOCK
, spin_lock
, 0, "&$->s_umount"},
451 { "ext4_lock_group", LOCK
, spin_lock
, 0, "$"},
452 { "ext4_unlock_group", UNLOCK
, spin_lock
, 0, "$"},
463 static struct macro_info macro_table
[] = {
464 {"genpd_lock", LOCK
, 0},
465 {"genpd_lock_nested", LOCK
, 0},
466 {"genpd_lock_interruptible", LOCK
, 0},
467 {"genpd_unlock", UNLOCK
, 0},
470 static const char *false_positives
[][2] = {
471 {"fs/jffs2/", "->alloc_sem"},
472 {"fs/xfs/", "->b_sema"},
473 {"mm/", "pvmw->ptl"},
474 {"drivers/gpu/drm/i915/", "->base.resv"},
477 static struct stree
*start_states
;
479 static struct tracker_list
*locks
;
481 static struct expression
*ignored_reset
;
482 static void reset(struct sm_state
*sm
, struct expression
*mod_expr
)
484 struct expression
*faked
;
486 if (mod_expr
&& mod_expr
->type
== EXPR_ASSIGNMENT
&&
487 mod_expr
->left
== ignored_reset
)
489 faked
= get_faked_expression();
490 if (faked
&& faked
->type
== EXPR_ASSIGNMENT
&&
491 faked
->left
== ignored_reset
)
494 set_state(my_id
, sm
->name
, sm
->sym
, &start_state
);
497 static struct smatch_state
*get_start_state(struct sm_state
*sm
)
499 struct smatch_state
*orig
;
504 orig
= get_state_stree(start_states
, my_id
, sm
->name
, sm
->sym
);
510 static struct expression
*remove_spinlock_check(struct expression
*expr
)
512 if (expr
->type
!= EXPR_CALL
)
514 if (expr
->fn
->type
!= EXPR_SYMBOL
)
516 if (strcmp(expr
->fn
->symbol_name
->name
, "spinlock_check"))
518 expr
= get_argument_from_call_expr(expr
->args
, 0);
522 static struct expression
*filter_kernel_args(struct expression
*arg
)
524 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&')
525 return strip_expr(arg
->unop
);
526 if (!is_pointer(arg
))
528 return deref_expression(strip_expr(arg
));
531 static char *lock_to_name_sym(struct expression
*expr
, struct symbol
**sym
)
533 expr
= remove_spinlock_check(expr
);
534 expr
= filter_kernel_args(expr
);
535 return expr_to_str_sym(expr
, sym
);
538 static struct smatch_state
*unmatched_state(struct sm_state
*sm
)
543 static void pre_merge_hook(struct sm_state
*cur
, struct sm_state
*other
)
545 if (is_impossible_path())
546 set_state(my_id
, cur
->name
, cur
->sym
, &impossible
);
549 static struct smatch_state
*merge_func(struct smatch_state
*s1
, struct smatch_state
*s2
)
551 if (s1
== &impossible
)
553 if (s2
== &impossible
)
558 static struct sm_state
*get_best_match(const char *key
, int lock_unlock
)
561 struct sm_state
*match
;
563 int start_pos
, state_len
, key_len
, chunks
, i
;
565 if (strncmp(key
, "$->", 3) == 0)
568 key_len
= strlen(key
);
570 for (i
= key_len
- 1; i
> 0; i
--) {
571 if (key
[i
] == '>' || key
[i
] == '.')
575 key_len
= strlen(key
);
580 FOR_EACH_MY_SM(my_id
, __get_cur_stree(), sm
) {
581 if (((lock_unlock
== UNLOCK
|| lock_unlock
== RESTORE
) &&
582 sm
->state
!= &locked
) ||
583 (lock_unlock
== LOCK
&& sm
->state
!= &unlocked
))
585 state_len
= strlen(sm
->name
);
586 if (state_len
< key_len
)
588 start_pos
= state_len
- key_len
;
589 if ((start_pos
== 0 || !isalnum(sm
->name
[start_pos
- 1])) &&
590 strcmp(sm
->name
+ start_pos
, key
) == 0) {
594 } END_FOR_EACH_SM(sm
);
601 static char *use_best_match(const char *key
, int lock_unlock
, struct symbol
**sym
)
603 struct sm_state
*match
;
605 match
= get_best_match(key
, lock_unlock
);
608 return alloc_string(key
);
611 return alloc_string(match
->name
);
614 static void set_start_state(const char *name
, struct symbol
*sym
, struct smatch_state
*start
)
616 struct smatch_state
*orig
;
618 orig
= get_state_stree(start_states
, my_id
, name
, sym
);
620 set_state_stree(&start_states
, my_id
, name
, sym
, start
);
621 else if (orig
!= start
)
622 set_state_stree(&start_states
, my_id
, name
, sym
, &undefined
);
625 static bool common_false_positive(const char *name
)
627 const char *path
, *lname
;
628 int i
, len_total
, len_path
, len_name
, skip
;
633 len_total
= strlen(name
);
634 for (i
= 0; i
< ARRAY_SIZE(false_positives
); i
++) {
635 path
= false_positives
[i
][0];
636 lname
= false_positives
[i
][1];
638 len_path
= strlen(path
);
639 len_name
= strlen(lname
);
641 if (len_name
> len_total
)
643 skip
= len_total
- len_name
;
645 if (strncmp(get_filename(), path
, len_path
) == 0 &&
646 strcmp(name
+ skip
, lname
) == 0)
653 static bool sm_in_start_states(struct sm_state
*sm
)
655 if (!sm
|| !cur_func_sym
)
657 if (sm
->line
== cur_func_sym
->pos
.line
)
662 static void warn_on_double(struct sm_state
*sm
, struct smatch_state
*state
)
664 struct sm_state
*tmp
;
669 FOR_EACH_PTR(sm
->possible
, tmp
) {
670 if (tmp
->state
== state
)
672 } END_FOR_EACH_PTR(tmp
);
676 // FIXME: called with read_lock held
677 // drivers/scsi/aic7xxx/aic7xxx_osm.c:1591 ahc_linux_isr() error: double locked 'flags' (orig line 1584)
678 if (strcmp(sm
->name
, "bottom_half") == 0)
680 if (strstr(sm
->name
, "rcu"))
682 if (strstr(sm
->name
, "timeline->mutex"))
684 if (common_false_positive(sm
->name
))
687 if (state
== &locked
&& sm_in_start_states(tmp
)) {
688 // sm_warning("called with lock held. '%s'", sm->name);
690 // sm_msg("error: double %s '%s' (orig line %u)",
691 // state->name, sm->name, tmp->line);
695 static bool handle_macro_lock_unlock(void)
697 struct expression
*expr
, *arg
;
698 struct macro_info
*info
;
706 expr
= last_ptr_list((struct ptr_list
*)big_expression_stack
);
707 while (expr
&& expr
->type
== EXPR_ASSIGNMENT
)
708 expr
= strip_expr(expr
->right
);
709 if (!expr
|| expr
->type
!= EXPR_CALL
)
712 macro
= get_macro_name(expr
->pos
);
716 for (i
= 0; i
< ARRAY_SIZE(macro_table
); i
++) {
717 info
= ¯o_table
[i
];
719 if (strcmp(macro
, info
->macro
) != 0)
721 arg
= get_argument_from_call_expr(expr
->args
, info
->param
);
722 name
= expr_to_str_sym(arg
, &sym
);
725 sm
= get_sm_state(my_id
, name
, sym
);
727 if (info
->action
== LOCK
) {
728 if (!get_start_state(sm
))
729 set_start_state(name
, sym
, &unlocked
);
730 if (sm
&& sm
->line
!= expr
->pos
.line
)
731 warn_on_double(sm
, &locked
);
732 set_state(my_id
, name
, sym
, &locked
);
734 if (!get_start_state(sm
))
735 set_start_state(name
, sym
, &locked
);
736 if (sm
&& sm
->line
!= expr
->pos
.line
)
737 warn_on_double(sm
, &unlocked
);
738 set_state(my_id
, name
, sym
, &unlocked
);
748 static bool is_local_IRQ_save(const char *name
, struct symbol
*sym
, struct lock_info
*info
)
750 if (name
&& strcmp(name
, "flags") == 0)
754 if (!sym
->ident
|| strcmp(sym
->ident
->name
, name
) != 0)
758 return strstr(info
->function
, "irq") && strstr(info
->function
, "save");
761 static void do_lock(const char *name
, struct symbol
*sym
, struct lock_info
*info
)
764 bool delete_null
= false;
766 if (!info
&& handle_macro_lock_unlock())
769 add_tracker(&locks
, my_id
, name
, sym
);
771 sm
= get_sm_state(my_id
, name
, sym
);
772 if (!get_start_state(sm
))
773 set_start_state(name
, sym
, &unlocked
);
774 if (!sm
&& !is_local_IRQ_save(name
, sym
, info
) && !sym
) {
775 sm
= get_best_match(name
, LOCK
);
784 warn_on_double(sm
, &locked
);
786 set_state(my_id
, name
, NULL
, &ignore
);
788 set_state(my_id
, name
, sym
, &locked
);
791 static void do_unlock(const char *name
, struct symbol
*sym
, struct lock_info
*info
)
794 bool delete_null
= false;
796 if (__path_is_null())
799 if (!info
&& handle_macro_lock_unlock())
802 add_tracker(&locks
, my_id
, name
, sym
);
803 sm
= get_sm_state(my_id
, name
, sym
);
804 if (!sm
&& !info
&& !is_local_IRQ_save(name
, sym
, info
)) {
805 sm
= get_best_match(name
, UNLOCK
);
814 if (!get_start_state(sm
))
815 set_start_state(name
, sym
, &locked
);
816 warn_on_double(sm
, &unlocked
);
818 set_state(my_id
, name
, NULL
, &ignore
);
819 set_state(my_id
, name
, sym
, &unlocked
);
822 static void do_restore(const char *name
, struct symbol
*sym
, struct lock_info
*info
)
826 if (__path_is_null())
829 sm
= get_sm_state(my_id
, name
, sym
);
830 if (!get_start_state(sm
))
831 set_start_state(name
, sym
, &locked
);
833 add_tracker(&locks
, my_id
, name
, sym
);
834 set_state(my_id
, name
, sym
, &restore
);
837 static int get_db_type(struct sm_state
*sm
)
840 * Bottom half is complicated because it's nestable.
841 * Say it's merged at the start and we lock and unlock then
842 * it should go back to merged.
844 if (sm
->state
== get_start_state(sm
)) {
845 if (sm
->state
== &locked
)
847 if (sm
->state
== &unlocked
)
848 return KNOWN_UNLOCKED
;
851 if (sm
->state
== &locked
)
853 if (sm
->state
== &unlocked
)
855 if (sm
->state
== &restore
)
860 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
862 struct smatch_state
*start
;
864 const char *param_name
;
867 FOR_EACH_MY_SM(my_id
, __get_cur_stree(), sm
) {
868 if (sm
->state
!= &locked
&&
869 sm
->state
!= &unlocked
&&
870 sm
->state
!= &restore
)
872 if (sm
->name
[0] == '$')
876 * If the state is locked at the end, that doesn't mean
877 * anything. It could be been locked at the start. Or
878 * it could be &merged at the start but its locked now
879 * because of implications and not because we set the
882 * This is slightly a hack, but when we change the state, we
883 * call set_start_state() so if get_start_state() returns NULL
884 * that means we haven't manually the locked state.
886 start
= get_start_state(sm
);
887 if (sm
->state
== &restore
) {
888 if (start
!= &locked
)
890 } else if (!start
|| sm
->state
== start
)
891 continue; /* !start means it was passed in */
893 param
= get_param_key_from_sm(sm
, expr
, ¶m_name
);
894 sql_insert_return_states(return_id
, return_ranges
,
896 param
, param_name
, "");
897 } END_FOR_EACH_SM(sm
);
900 static int sm_both_locked_and_unlocked(struct sm_state
*sm
)
904 struct sm_state
*tmp
;
906 if (sm
->state
!= &merged
)
909 FOR_EACH_PTR(sm
->possible
, tmp
) {
910 if (tmp
->state
== &locked
)
912 if (tmp
->state
== &unlocked
)
914 } END_FOR_EACH_PTR(tmp
);
916 return is_locked
&& is_unlocked
;
920 static bool is_EINTR(struct range_list
*rl
)
924 if (!rl_to_sval(rl
, &sval
))
926 return sval
.value
== -4;
929 static bool sym_in_lock_table(struct symbol
*sym
)
933 if (!sym
|| !sym
->ident
)
936 for (i
= 0; lock_table
[i
].function
!= NULL
; i
++) {
937 if (strcmp(lock_table
[i
].function
, sym
->ident
->name
) == 0)
943 static bool func_in_lock_table(struct expression
*expr
)
945 if (expr
->type
!= EXPR_SYMBOL
)
947 return sym_in_lock_table(expr
->symbol
);
950 #define NUM_BUCKETS (RET_UNKNOWN + 1)
952 static void check_lock(char *name
, struct symbol
*sym
)
954 struct range_list
*locked_lines
= NULL
;
955 struct range_list
*unlocked_lines
= NULL
;
956 int locked_buckets
[NUM_BUCKETS
] = {};
957 int unlocked_buckets
[NUM_BUCKETS
] = {};
958 struct stree
*stree
, *orig
;
959 struct sm_state
*return_sm
;
961 sval_t line
= sval_type_val(&int_ctype
, 0);
965 if (sym_in_lock_table(cur_func_sym
))
968 FOR_EACH_PTR(get_all_return_strees(), stree
) {
969 orig
= __swap_cur_stree(stree
);
971 if (is_impossible_path())
974 return_sm
= get_sm_state(RETURN_ID
, "return_ranges", NULL
);
977 line
.value
= return_sm
->line
;
979 sm
= get_sm_state(my_id
, name
, sym
);
983 if (parent_is_gone_var_sym(sm
->name
, sm
->sym
))
986 if (sm
->state
!= &locked
&&
987 sm
->state
!= &unlocked
&&
988 sm
->state
!= &restore
)
991 if ((sm
->state
== &unlocked
|| sm
->state
== &restore
) &&
992 is_EINTR(estate_rl(return_sm
->state
)))
995 bucket
= success_fail_return(estate_rl(return_sm
->state
));
996 if (sm
->state
== &locked
) {
997 add_range(&locked_lines
, line
, line
);
998 locked_buckets
[bucket
] = true;
1000 if (sm
->state
== &unlocked
|| sm
->state
== &restore
) {
1001 add_range(&unlocked_lines
, line
, line
);
1002 unlocked_buckets
[bucket
] = true;
1005 __swap_cur_stree(orig
);
1006 } END_FOR_EACH_PTR(stree
);
1009 if (!locked_lines
|| !unlocked_lines
)
1012 for (i
= 0; i
< NUM_BUCKETS
; i
++) {
1013 if (locked_buckets
[i
] && unlocked_buckets
[i
])
1017 if (locked_buckets
[RET_FAIL
])
1023 if (common_false_positive(name
))
1026 sm_msg("warn: inconsistent returns '%s'.", name
);
1027 sm_printf(" Locked on : %s\n", show_rl(locked_lines
));
1028 sm_printf(" Unlocked on: %s\n", show_rl(unlocked_lines
));
1031 static void match_func_end(struct symbol
*sym
)
1033 struct tracker
*tracker
;
1035 FOR_EACH_PTR(locks
, tracker
) {
1036 check_lock(tracker
->name
, tracker
->sym
);
1037 } END_FOR_EACH_PTR(tracker
);
1040 static void db_param_locked_unlocked(struct expression
*expr
, int param
, const char *key
, int lock_unlock
, struct lock_info
*info
)
1042 struct expression
*call
, *arg
;
1046 if (info
&& info
->action
== IGNORE_LOCK
)
1050 while (call
->type
== EXPR_ASSIGNMENT
)
1051 call
= strip_expr(call
->right
);
1052 if (call
->type
!= EXPR_CALL
)
1055 if (!info
&& func_in_lock_table(call
->fn
))
1060 name
= use_best_match(key
, lock_unlock
, &sym
);
1062 name
= alloc_string(info
->key
);
1065 } else if (param
== -1) {
1066 if (expr
->type
!= EXPR_ASSIGNMENT
)
1068 ignored_reset
= expr
->left
;
1070 name
= get_variable_from_key(expr
->left
, key
, &sym
);
1072 arg
= get_argument_from_call_expr(call
->args
, param
);
1076 arg
= remove_spinlock_check(arg
);
1077 name
= get_variable_from_key(arg
, key
, &sym
);
1083 if (lock_unlock
== LOCK
)
1084 do_lock(name
, sym
, info
);
1085 else if (lock_unlock
== UNLOCK
)
1086 do_unlock(name
, sym
, info
);
1087 else if (lock_unlock
== RESTORE
)
1088 do_restore(name
, sym
, info
);
1094 static void db_param_locked(struct expression
*expr
, int param
, char *key
, char *value
)
1096 db_param_locked_unlocked(expr
, param
, key
, LOCK
, NULL
);
1099 static void db_param_unlocked(struct expression
*expr
, int param
, char *key
, char *value
)
1101 db_param_locked_unlocked(expr
, param
, key
, UNLOCK
, NULL
);
1104 static void db_param_restore(struct expression
*expr
, int param
, char *key
, char *value
)
1106 db_param_locked_unlocked(expr
, param
, key
, RESTORE
, NULL
);
1109 static void match_lock_unlock(const char *fn
, struct expression
*expr
, void *data
)
1111 struct lock_info
*info
= data
;
1112 struct expression
*parent
;
1114 if (info
->arg
== -1) {
1115 parent
= expr_get_parent_expr(expr
);
1116 while (parent
&& parent
->type
!= EXPR_ASSIGNMENT
)
1117 parent
= expr_get_parent_expr(parent
);
1118 if (!parent
|| parent
->type
!= EXPR_ASSIGNMENT
)
1123 db_param_locked_unlocked(expr
, info
->arg
, info
->key
, info
->action
, info
);
1126 static void match_lock_held(const char *fn
, struct expression
*call_expr
,
1127 struct expression
*assign_expr
, void *data
)
1129 struct lock_info
*info
= data
;
1131 db_param_locked_unlocked(assign_expr
?: call_expr
, info
->arg
, info
->key
, info
->action
, info
);
1134 static void match_assign(struct expression
*expr
)
1136 struct smatch_state
*state
;
1138 /* This is only for the DB */
1139 if (is_fake_var_assign(expr
))
1141 state
= get_state_expr(my_id
, expr
->right
);
1144 set_state_expr(my_id
, expr
->left
, state
);
1147 static struct stree
*printed
;
1148 static void call_info_callback(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
)
1150 int locked_type
= 0;
1152 if (sm
->state
== &locked
)
1154 else if (sm
->state
== &unlocked
)
1155 locked_type
= UNLOCK
;
1156 else if (slist_has_state(sm
->possible
, &locked
) ||
1157 slist_has_state(sm
->possible
, &half_locked
))
1158 locked_type
= HALF_LOCKED
;
1162 avl_insert(&printed
, sm
);
1163 sql_insert_caller_info(call
, locked_type
, param
, printed_name
, "");
1166 static void match_call_info(struct expression
*expr
)
1168 struct sm_state
*sm
;
1172 FOR_EACH_MY_SM(my_id
, __get_cur_stree(), sm
) {
1173 if (sm
->state
== &locked
)
1175 else if (sm
->state
== &half_locked
||
1176 slist_has_state(sm
->possible
, &locked
))
1177 locked_type
= HALF_LOCKED
;
1181 if (avl_lookup(printed
, sm
))
1184 if (strcmp(sm
->name
, "bottom_half") == 0)
1186 else if (strcmp(sm
->name
, "rcu_read") == 0)
1187 name
= "rcu_read_lock";
1191 if (strncmp(name
, "__fake_param", 12) == 0 ||
1195 sql_insert_caller_info(expr
, locked_type
, -2, name
, "");
1196 } END_FOR_EACH_SM(sm
);
1197 free_stree(&printed
);
1200 static void set_locked(const char *name
, struct symbol
*sym
, char *value
)
1202 set_state(my_id
, name
, sym
, &locked
);
1205 static void set_half_locked(const char *name
, struct symbol
*sym
, char *value
)
1207 set_state(my_id
, name
, sym
, &half_locked
);
1210 static void set_unlocked(const char *name
, struct symbol
*sym
, char *value
)
1212 set_state(my_id
, name
, sym
, &unlocked
);
1215 static void match_after_func(struct symbol
*sym
)
1217 free_stree(&start_states
);
1220 static void match_dma_resv_lock_NULL(const char *fn
, struct expression
*call_expr
,
1221 struct expression
*assign_expr
, void *_index
)
1223 struct expression
*lock
, *ctx
;
1227 lock
= get_argument_from_call_expr(call_expr
->args
, 0);
1228 ctx
= get_argument_from_call_expr(call_expr
->args
, 1);
1229 if (!expr_is_zero(ctx
))
1232 lock_name
= lock_to_name_sym(lock
, &sym
);
1233 if (!lock_name
|| !sym
)
1235 do_lock(lock_name
, sym
, NULL
);
1237 free_string(lock_name
);
1240 /* print_held_locks() is used in check_call_tree.c */
1241 void print_held_locks(void)
1243 struct stree
*stree
;
1244 struct sm_state
*sm
;
1247 stree
= __get_cur_stree();
1248 FOR_EACH_MY_SM(my_id
, stree
, sm
) {
1249 if (sm
->state
!= &locked
)
1253 sm_printf("'%s'", sm
->name
);
1254 } END_FOR_EACH_SM(sm
);
1257 static void load_table(struct lock_info
*lock_table
)
1261 for (i
= 0; lock_table
[i
].function
!= NULL
; i
++) {
1262 struct lock_info
*lock
= &lock_table
[i
];
1264 if (lock
->call_back
) {
1265 add_function_hook(lock
->function
, lock
->call_back
, lock
);
1266 } else if (lock
->implies_start
) {
1267 return_implies_state_sval(lock
->function
,
1268 *lock
->implies_start
,
1270 &match_lock_held
, lock
);
1272 add_function_hook(lock
->function
, &match_lock_unlock
, lock
);
1277 static bool is_smp_config(void)
1281 id
= built_in_ident("CONFIG_SMP");
1282 return !!lookup_symbol(id
, NS_MACRO
);
1285 void check_locking(int id
)
1289 if (option_project
!= PROJ_KERNEL
)
1292 if (!is_smp_config())
1295 load_table(lock_table
);
1297 set_dynamic_states(my_id
);
1298 add_unmatched_state_hook(my_id
, &unmatched_state
);
1299 add_pre_merge_hook(my_id
, &pre_merge_hook
);
1300 add_merge_hook(my_id
, &merge_func
);
1301 add_modification_hook(my_id
, &reset
);
1303 add_hook(&match_assign
, ASSIGNMENT_HOOK
);
1304 add_hook(&match_func_end
, END_FUNC_HOOK
);
1306 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
1307 add_function_data((unsigned long *)&start_states
);
1309 add_caller_info_callback(my_id
, call_info_callback
);
1310 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
1312 add_split_return_callback(match_return_info
);
1313 select_return_states_hook(LOCK
, &db_param_locked
);
1314 select_return_states_hook(UNLOCK
, &db_param_unlocked
);
1315 select_return_states_hook(RESTORE
, &db_param_restore
);
1317 select_caller_name_sym(set_locked
, LOCK
);
1318 select_caller_name_sym(set_half_locked
, HALF_LOCKED
);
1319 select_caller_name_sym(set_unlocked
, UNLOCK
);
1321 return_implies_state("dma_resv_lock", -4095, -1, &match_dma_resv_lock_NULL
, 0);