2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2019 Andrew Turner
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory (Department of Computer Science and
8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
9 * DARPA SSITH research programme.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #ifndef _SYS__CSAN_ATOMIC_H_
36 #define _SYS__CSAN_ATOMIC_H_
38 #ifndef _MACHINE_ATOMIC_H_
39 #error do not include this header, use machine/atomic.h
42 #define KCSAN_ATOMIC_FUNC_1(op, name, type) \
43 void kcsan_atomic_##op##_##name(volatile type *, type); \
44 void kcsan_atomic_##op##_acq_##name(volatile type *, type); \
45 void kcsan_atomic_##op##_rel_##name(volatile type *, type)
47 #define KCSAN_ATOMIC_CMPSET(name, type) \
48 int kcsan_atomic_cmpset_##name(volatile type *, type, type); \
49 int kcsan_atomic_cmpset_acq_##name(volatile type *, type, type); \
50 int kcsan_atomic_cmpset_rel_##name(volatile type *, type, type)
52 #define KCSAN_ATOMIC_FCMPSET(name, type) \
53 int kcsan_atomic_fcmpset_##name(volatile type *, type *, type); \
54 int kcsan_atomic_fcmpset_acq_##name(volatile type *, type *, type); \
55 int kcsan_atomic_fcmpset_rel_##name(volatile type *, type *, type)
57 #define KCSAN_ATOMIC_READ(op, name, type) \
58 type kcsan_atomic_##op##_##name(volatile type *, type)
60 #define KCSAN_ATOMIC_READANDCLEAR(name, type) \
61 type kcsan_atomic_readandclear_##name(volatile type *)
63 #define KCSAN_ATOMIC_LOAD(name, type) \
64 type kcsan_atomic_load_##name(volatile type *); \
65 type kcsan_atomic_load_acq_##name(volatile type *)
67 #define KCSAN_ATOMIC_STORE(name, type) \
68 void kcsan_atomic_store_##name(volatile type *, type); \
69 void kcsan_atomic_store_rel_##name(volatile type *, type)
71 #define KCSAN_ATOMIC_TEST(op, name, type) \
72 int kcsan_atomic_##op##_##name(volatile type *, u_int); \
73 int kcsan_atomic_##op##_acq_##name(volatile type *, u_int)
75 #define KCSAN_ATOMIC_FUNCS(name, type) \
76 KCSAN_ATOMIC_FUNC_1(add, name, type); \
77 KCSAN_ATOMIC_FUNC_1(clear, name, type); \
78 KCSAN_ATOMIC_CMPSET(name, type); \
79 KCSAN_ATOMIC_FCMPSET(name, type); \
80 KCSAN_ATOMIC_READ(fetchadd, name, type); \
81 KCSAN_ATOMIC_LOAD(name, type); \
82 KCSAN_ATOMIC_READANDCLEAR(name, type); \
83 KCSAN_ATOMIC_FUNC_1(set, name, type); \
84 KCSAN_ATOMIC_FUNC_1(subtract, name, type); \
85 KCSAN_ATOMIC_STORE(name, type); \
86 KCSAN_ATOMIC_READ(swap, name, type); \
87 KCSAN_ATOMIC_TEST(testandclear, name, type); \
88 KCSAN_ATOMIC_TEST(testandset, name, type)
90 KCSAN_ATOMIC_FUNCS(char, uint8_t);
91 KCSAN_ATOMIC_FUNCS(short, uint16_t);
92 KCSAN_ATOMIC_FUNCS(int, u_int);
93 KCSAN_ATOMIC_FUNCS(long, u_long);
94 KCSAN_ATOMIC_FUNCS(ptr, uintptr_t);
95 KCSAN_ATOMIC_FUNCS(8, uint8_t);
96 KCSAN_ATOMIC_FUNCS(16, uint16_t);
97 KCSAN_ATOMIC_FUNCS(32, uint32_t);
98 KCSAN_ATOMIC_FUNCS(64, uint64_t);
100 void kcsan_atomic_thread_fence_acq(void);
101 void kcsan_atomic_thread_fence_acq_rel(void);
102 void kcsan_atomic_thread_fence_rel(void);
103 void kcsan_atomic_thread_fence_seq_cst(void);
105 #ifndef KCSAN_RUNTIME
107 #define atomic_add_char kcsan_atomic_add_char
108 #define atomic_add_acq_char kcsan_atomic_add_acq_char
109 #define atomic_add_rel_char kcsan_atomic_add_rel_char
110 #define atomic_clear_char kcsan_atomic_clear_char
111 #define atomic_clear_acq_char kcsan_atomic_clear_acq_char
112 #define atomic_clear_rel_char kcsan_atomic_clear_rel_char
113 #define atomic_cmpset_char kcsan_atomic_cmpset_char
114 #define atomic_cmpset_acq_char kcsan_atomic_cmpset_acq_char
115 #define atomic_cmpset_rel_char kcsan_atomic_cmpset_rel_char
116 #define atomic_fcmpset_char kcsan_atomic_fcmpset_char
117 #define atomic_fcmpset_acq_char kcsan_atomic_fcmpset_acq_char
118 #define atomic_fcmpset_rel_char kcsan_atomic_fcmpset_rel_char
119 #define atomic_fetchadd_char kcsan_atomic_fetchadd_char
120 #define atomic_load_char kcsan_atomic_load_char
121 #define atomic_load_acq_char kcsan_atomic_load_acq_char
122 #define atomic_readandclear_char kcsan_atomic_readandclear_char
123 #define atomic_set_char kcsan_atomic_set_char
124 #define atomic_set_acq_char kcsan_atomic_set_acq_char
125 #define atomic_set_rel_char kcsan_atomic_set_rel_char
126 #define atomic_subtract_char kcsan_atomic_subtract_char
127 #define atomic_subtract_acq_char kcsan_atomic_subtract_acq_char
128 #define atomic_subtract_rel_char kcsan_atomic_subtract_rel_char
129 #define atomic_store_char kcsan_atomic_store_char
130 #define atomic_store_rel_char kcsan_atomic_store_rel_char
131 #define atomic_swap_char kcsan_atomic_swap_char
132 #define atomic_testandclear_char kcsan_atomic_testandclear_char
133 #define atomic_testandset_char kcsan_atomic_testandset_char
135 #define atomic_add_short kcsan_atomic_add_short
136 #define atomic_add_acq_short kcsan_atomic_add_acq_short
137 #define atomic_add_rel_short kcsan_atomic_add_rel_short
138 #define atomic_clear_short kcsan_atomic_clear_short
139 #define atomic_clear_acq_short kcsan_atomic_clear_acq_short
140 #define atomic_clear_rel_short kcsan_atomic_clear_rel_short
141 #define atomic_cmpset_short kcsan_atomic_cmpset_short
142 #define atomic_cmpset_acq_short kcsan_atomic_cmpset_acq_short
143 #define atomic_cmpset_rel_short kcsan_atomic_cmpset_rel_short
144 #define atomic_fcmpset_short kcsan_atomic_fcmpset_short
145 #define atomic_fcmpset_acq_short kcsan_atomic_fcmpset_acq_short
146 #define atomic_fcmpset_rel_short kcsan_atomic_fcmpset_rel_short
147 #define atomic_fetchadd_short kcsan_atomic_fetchadd_short
148 #define atomic_load_short kcsan_atomic_load_short
149 #define atomic_load_acq_short kcsan_atomic_load_acq_short
150 #define atomic_readandclear_short kcsan_atomic_readandclear_short
151 #define atomic_set_short kcsan_atomic_set_short
152 #define atomic_set_acq_short kcsan_atomic_set_acq_short
153 #define atomic_set_rel_short kcsan_atomic_set_rel_short
154 #define atomic_subtract_short kcsan_atomic_subtract_short
155 #define atomic_subtract_acq_short kcsan_atomic_subtract_acq_short
156 #define atomic_subtract_rel_short kcsan_atomic_subtract_rel_short
157 #define atomic_store_short kcsan_atomic_store_short
158 #define atomic_store_rel_short kcsan_atomic_store_rel_short
159 #define atomic_swap_short kcsan_atomic_swap_short
160 #define atomic_testandclear_short kcsan_atomic_testandclear_short
161 #define atomic_testandset_short kcsan_atomic_testandset_short
163 #define atomic_add_int kcsan_atomic_add_int
164 #define atomic_add_acq_int kcsan_atomic_add_acq_int
165 #define atomic_add_rel_int kcsan_atomic_add_rel_int
166 #define atomic_clear_int kcsan_atomic_clear_int
167 #define atomic_clear_acq_int kcsan_atomic_clear_acq_int
168 #define atomic_clear_rel_int kcsan_atomic_clear_rel_int
169 #define atomic_cmpset_int kcsan_atomic_cmpset_int
170 #define atomic_cmpset_acq_int kcsan_atomic_cmpset_acq_int
171 #define atomic_cmpset_rel_int kcsan_atomic_cmpset_rel_int
172 #define atomic_fcmpset_int kcsan_atomic_fcmpset_int
173 #define atomic_fcmpset_acq_int kcsan_atomic_fcmpset_acq_int
174 #define atomic_fcmpset_rel_int kcsan_atomic_fcmpset_rel_int
175 #define atomic_fetchadd_int kcsan_atomic_fetchadd_int
176 #define atomic_load_int kcsan_atomic_load_int
177 #define atomic_load_acq_int kcsan_atomic_load_acq_int
178 #define atomic_readandclear_int kcsan_atomic_readandclear_int
179 #define atomic_set_int kcsan_atomic_set_int
180 #define atomic_set_acq_int kcsan_atomic_set_acq_int
181 #define atomic_set_rel_int kcsan_atomic_set_rel_int
182 #define atomic_subtract_int kcsan_atomic_subtract_int
183 #define atomic_subtract_acq_int kcsan_atomic_subtract_acq_int
184 #define atomic_subtract_rel_int kcsan_atomic_subtract_rel_int
185 #define atomic_store_int kcsan_atomic_store_int
186 #define atomic_store_rel_int kcsan_atomic_store_rel_int
187 #define atomic_swap_int kcsan_atomic_swap_int
188 #define atomic_testandclear_int kcsan_atomic_testandclear_int
189 #define atomic_testandset_int kcsan_atomic_testandset_int
191 #define atomic_add_long kcsan_atomic_add_long
192 #define atomic_add_acq_long kcsan_atomic_add_acq_long
193 #define atomic_add_rel_long kcsan_atomic_add_rel_long
194 #define atomic_clear_long kcsan_atomic_clear_long
195 #define atomic_clear_acq_long kcsan_atomic_clear_acq_long
196 #define atomic_clear_rel_long kcsan_atomic_clear_rel_long
197 #define atomic_cmpset_long kcsan_atomic_cmpset_long
198 #define atomic_cmpset_acq_long kcsan_atomic_cmpset_acq_long
199 #define atomic_cmpset_rel_long kcsan_atomic_cmpset_rel_long
200 #define atomic_fcmpset_long kcsan_atomic_fcmpset_long
201 #define atomic_fcmpset_acq_long kcsan_atomic_fcmpset_acq_long
202 #define atomic_fcmpset_rel_long kcsan_atomic_fcmpset_rel_long
203 #define atomic_fetchadd_long kcsan_atomic_fetchadd_long
204 #define atomic_load_long kcsan_atomic_load_long
205 #define atomic_load_acq_long kcsan_atomic_load_acq_long
206 #define atomic_readandclear_long kcsan_atomic_readandclear_long
207 #define atomic_set_long kcsan_atomic_set_long
208 #define atomic_set_acq_long kcsan_atomic_set_acq_long
209 #define atomic_set_rel_long kcsan_atomic_set_rel_long
210 #define atomic_subtract_long kcsan_atomic_subtract_long
211 #define atomic_subtract_acq_long kcsan_atomic_subtract_acq_long
212 #define atomic_subtract_rel_long kcsan_atomic_subtract_rel_long
213 #define atomic_store_long kcsan_atomic_store_long
214 #define atomic_store_rel_long kcsan_atomic_store_rel_long
215 #define atomic_swap_long kcsan_atomic_swap_long
216 #define atomic_testandclear_long kcsan_atomic_testandclear_long
217 #define atomic_testandset_long kcsan_atomic_testandset_long
218 #define atomic_testandset_acq_long kcsan_atomic_testandset_acq_long
220 #define atomic_add_ptr kcsan_atomic_add_ptr
221 #define atomic_add_acq_ptr kcsan_atomic_add_acq_ptr
222 #define atomic_add_rel_ptr kcsan_atomic_add_rel_ptr
223 #define atomic_clear_ptr kcsan_atomic_clear_ptr
224 #define atomic_clear_acq_ptr kcsan_atomic_clear_acq_ptr
225 #define atomic_clear_rel_ptr kcsan_atomic_clear_rel_ptr
226 #define atomic_cmpset_ptr kcsan_atomic_cmpset_ptr
227 #define atomic_cmpset_acq_ptr kcsan_atomic_cmpset_acq_ptr
228 #define atomic_cmpset_rel_ptr kcsan_atomic_cmpset_rel_ptr
229 #define atomic_fcmpset_ptr kcsan_atomic_fcmpset_ptr
230 #define atomic_fcmpset_acq_ptr kcsan_atomic_fcmpset_acq_ptr
231 #define atomic_fcmpset_rel_ptr kcsan_atomic_fcmpset_rel_ptr
232 #define atomic_fetchadd_ptr kcsan_atomic_fetchadd_ptr
233 #define atomic_load_ptr(x) ({ \
234 __typeof(*x) __retptr; \
235 __retptr = (void *)kcsan_atomic_load_ptr((volatile uintptr_t *)(x)); \
238 #define atomic_load_acq_ptr kcsan_atomic_load_acq_ptr
239 #define atomic_readandclear_ptr kcsan_atomic_readandclear_ptr
240 #define atomic_set_ptr kcsan_atomic_set_ptr
241 #define atomic_set_acq_ptr kcsan_atomic_set_acq_ptr
242 #define atomic_set_rel_ptr kcsan_atomic_set_rel_ptr
243 #define atomic_subtract_ptr kcsan_atomic_subtract_ptr
244 #define atomic_subtract_acq_ptr kcsan_atomic_subtract_acq_ptr
245 #define atomic_subtract_rel_ptr kcsan_atomic_subtract_rel_ptr
246 #define atomic_store_ptr kcsan_atomic_store_ptr
247 #define atomic_store_rel_ptr kcsan_atomic_store_rel_ptr
248 #define atomic_swap_ptr kcsan_atomic_swap_ptr
249 #define atomic_testandclear_ptr kcsan_atomic_testandclear_ptr
250 #define atomic_testandset_ptr kcsan_atomic_testandset_ptr
252 #define atomic_add_8 kcsan_atomic_add_8
253 #define atomic_add_acq_8 kcsan_atomic_add_acq_8
254 #define atomic_add_rel_8 kcsan_atomic_add_rel_8
255 #define atomic_clear_8 kcsan_atomic_clear_8
256 #define atomic_clear_acq_8 kcsan_atomic_clear_acq_8
257 #define atomic_clear_rel_8 kcsan_atomic_clear_rel_8
258 #define atomic_cmpset_8 kcsan_atomic_cmpset_8
259 #define atomic_cmpset_acq_8 kcsan_atomic_cmpset_acq_8
260 #define atomic_cmpset_rel_8 kcsan_atomic_cmpset_rel_8
261 #define atomic_fcmpset_8 kcsan_atomic_fcmpset_8
262 #define atomic_fcmpset_acq_8 kcsan_atomic_fcmpset_acq_8
263 #define atomic_fcmpset_rel_8 kcsan_atomic_fcmpset_rel_8
264 #define atomic_fetchadd_8 kcsan_atomic_fetchadd_8
265 #define atomic_load_8 kcsan_atomic_load_8
266 #define atomic_load_acq_8 kcsan_atomic_load_acq_8
267 #define atomic_readandclear_8 kcsan_atomic_readandclear_8
268 #define atomic_set_8 kcsan_atomic_set_8
269 #define atomic_set_acq_8 kcsan_atomic_set_acq_8
270 #define atomic_set_rel_8 kcsan_atomic_set_rel_8
271 #define atomic_subtract_8 kcsan_atomic_subtract_8
272 #define atomic_subtract_acq_8 kcsan_atomic_subtract_acq_8
273 #define atomic_subtract_rel_8 kcsan_atomic_subtract_rel_8
274 #define atomic_store_8 kcsan_atomic_store_8
275 #define atomic_store_rel_8 kcsan_atomic_store_rel_8
276 #define atomic_swap_8 kcsan_atomic_swap_8
277 #define atomic_testandclear_8 kcsan_atomic_testandclear_8
278 #define atomic_testandset_8 kcsan_atomic_testandset_8
280 #define atomic_add_16 kcsan_atomic_add_16
281 #define atomic_add_acq_16 kcsan_atomic_add_acq_16
282 #define atomic_add_rel_16 kcsan_atomic_add_rel_16
283 #define atomic_clear_16 kcsan_atomic_clear_16
284 #define atomic_clear_acq_16 kcsan_atomic_clear_acq_16
285 #define atomic_clear_rel_16 kcsan_atomic_clear_rel_16
286 #define atomic_cmpset_16 kcsan_atomic_cmpset_16
287 #define atomic_cmpset_acq_16 kcsan_atomic_cmpset_acq_16
288 #define atomic_cmpset_rel_16 kcsan_atomic_cmpset_rel_16
289 #define atomic_fcmpset_16 kcsan_atomic_fcmpset_16
290 #define atomic_fcmpset_acq_16 kcsan_atomic_fcmpset_acq_16
291 #define atomic_fcmpset_rel_16 kcsan_atomic_fcmpset_rel_16
292 #define atomic_fetchadd_16 kcsan_atomic_fetchadd_16
293 #define atomic_load_16 kcsan_atomic_load_16
294 #define atomic_load_acq_16 kcsan_atomic_load_acq_16
295 #define atomic_readandclear_16 kcsan_atomic_readandclear_16
296 #define atomic_set_16 kcsan_atomic_set_16
297 #define atomic_set_acq_16 kcsan_atomic_set_acq_16
298 #define atomic_set_rel_16 kcsan_atomic_set_rel_16
299 #define atomic_subtract_16 kcsan_atomic_subtract_16
300 #define atomic_subtract_acq_16 kcsan_atomic_subtract_acq_16
301 #define atomic_subtract_rel_16 kcsan_atomic_subtract_rel_16
302 #define atomic_store_16 kcsan_atomic_store_16
303 #define atomic_store_rel_16 kcsan_atomic_store_rel_16
304 #define atomic_swap_16 kcsan_atomic_swap_16
305 #define atomic_testandclear_16 kcsan_atomic_testandclear_16
306 #define atomic_testandset_16 kcsan_atomic_testandset_16
308 #define atomic_add_32 kcsan_atomic_add_32
309 #define atomic_add_acq_32 kcsan_atomic_add_acq_32
310 #define atomic_add_rel_32 kcsan_atomic_add_rel_32
311 #define atomic_clear_32 kcsan_atomic_clear_32
312 #define atomic_clear_acq_32 kcsan_atomic_clear_acq_32
313 #define atomic_clear_rel_32 kcsan_atomic_clear_rel_32
314 #define atomic_cmpset_32 kcsan_atomic_cmpset_32
315 #define atomic_cmpset_acq_32 kcsan_atomic_cmpset_acq_32
316 #define atomic_cmpset_rel_32 kcsan_atomic_cmpset_rel_32
317 #define atomic_fcmpset_32 kcsan_atomic_fcmpset_32
318 #define atomic_fcmpset_acq_32 kcsan_atomic_fcmpset_acq_32
319 #define atomic_fcmpset_rel_32 kcsan_atomic_fcmpset_rel_32
320 #define atomic_fetchadd_32 kcsan_atomic_fetchadd_32
321 #define atomic_load_32 kcsan_atomic_load_32
322 #define atomic_load_acq_32 kcsan_atomic_load_acq_32
323 #define atomic_readandclear_32 kcsan_atomic_readandclear_32
324 #define atomic_set_32 kcsan_atomic_set_32
325 #define atomic_set_acq_32 kcsan_atomic_set_acq_32
326 #define atomic_set_rel_32 kcsan_atomic_set_rel_32
327 #define atomic_subtract_32 kcsan_atomic_subtract_32
328 #define atomic_subtract_acq_32 kcsan_atomic_subtract_acq_32
329 #define atomic_subtract_rel_32 kcsan_atomic_subtract_rel_32
330 #define atomic_store_32 kcsan_atomic_store_32
331 #define atomic_store_rel_32 kcsan_atomic_store_rel_32
332 #define atomic_swap_32 kcsan_atomic_swap_32
333 #define atomic_testandclear_32 kcsan_atomic_testandclear_32
334 #define atomic_testandset_32 kcsan_atomic_testandset_32
336 #define atomic_add_64 kcsan_atomic_add_64
337 #define atomic_add_acq_64 kcsan_atomic_add_acq_64
338 #define atomic_add_rel_64 kcsan_atomic_add_rel_64
339 #define atomic_clear_64 kcsan_atomic_clear_64
340 #define atomic_clear_acq_64 kcsan_atomic_clear_acq_64
341 #define atomic_clear_rel_64 kcsan_atomic_clear_rel_64
342 #define atomic_cmpset_64 kcsan_atomic_cmpset_64
343 #define atomic_cmpset_acq_64 kcsan_atomic_cmpset_acq_64
344 #define atomic_cmpset_rel_64 kcsan_atomic_cmpset_rel_64
345 #define atomic_fcmpset_64 kcsan_atomic_fcmpset_64
346 #define atomic_fcmpset_acq_64 kcsan_atomic_fcmpset_acq_64
347 #define atomic_fcmpset_rel_64 kcsan_atomic_fcmpset_rel_64
348 #define atomic_fetchadd_64 kcsan_atomic_fetchadd_64
349 #define atomic_load_64 kcsan_atomic_load_64
350 #define atomic_load_acq_64 kcsan_atomic_load_acq_64
351 #define atomic_readandclear_64 kcsan_atomic_readandclear_64
352 #define atomic_set_64 kcsan_atomic_set_64
353 #define atomic_set_acq_64 kcsan_atomic_set_acq_64
354 #define atomic_set_rel_64 kcsan_atomic_set_rel_64
355 #define atomic_subtract_64 kcsan_atomic_subtract_64
356 #define atomic_subtract_acq_64 kcsan_atomic_subtract_acq_64
357 #define atomic_subtract_rel_64 kcsan_atomic_subtract_rel_64
358 #define atomic_store_64 kcsan_atomic_store_64
359 #define atomic_store_rel_64 kcsan_atomic_store_rel_64
360 #define atomic_swap_64 kcsan_atomic_swap_64
361 #define atomic_testandclear_64 kcsan_atomic_testandclear_64
362 #define atomic_testandset_64 kcsan_atomic_testandset_64
364 #define atomic_thread_fence_acq kcsan_atomic_thread_fence_acq
365 #define atomic_thread_fence_acq_rel kcsan_atomic_thread_fence_acq_rel
366 #define atomic_thread_fence_rel kcsan_atomic_thread_fence_rel
367 #define atomic_thread_fence_seq_cst kcsan_atomic_thread_fence_seq_cst
369 #endif /* !KCSAN_RUNTIME */
371 #endif /* !_SYS__CSAN_ATOMIC_H_ */