1 /* GCC instrumentation plugin for ThreadSanitizer.
2 Copyright (C) 2011-2014 Free Software Foundation, Inc.
3 Contributed by Dmitry Vyukov <dvyukov@google.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "basic-block.h"
30 #include "tree-ssa-alias.h"
31 #include "internal-fn.h"
32 #include "gimple-expr.h"
36 #include "gimple-iterator.h"
38 #include "gimple-ssa.h"
41 #include "stringpool.h"
42 #include "tree-ssanames.h"
43 #include "tree-pass.h"
44 #include "tree-iterator.h"
45 #include "langhooks.h"
49 #include "diagnostic.h"
50 #include "tree-ssa-propagate.h"
54 /* Number of instrumented memory accesses in the current function. */
56 /* Builds the following decl
57 void __tsan_read/writeX (void *addr); */
60 get_memory_access_decl (bool is_write
, unsigned size
)
62 enum built_in_function fcode
;
65 fcode
= is_write
? BUILT_IN_TSAN_WRITE1
66 : BUILT_IN_TSAN_READ1
;
68 fcode
= is_write
? BUILT_IN_TSAN_WRITE2
69 : BUILT_IN_TSAN_READ2
;
71 fcode
= is_write
? BUILT_IN_TSAN_WRITE4
72 : BUILT_IN_TSAN_READ4
;
74 fcode
= is_write
? BUILT_IN_TSAN_WRITE8
75 : BUILT_IN_TSAN_READ8
;
77 fcode
= is_write
? BUILT_IN_TSAN_WRITE16
78 : BUILT_IN_TSAN_READ16
;
80 return builtin_decl_implicit (fcode
);
83 /* Check as to whether EXPR refers to a store to vptr. */
86 is_vptr_store (gimple stmt
, tree expr
, bool is_write
)
89 && gimple_assign_single_p (stmt
)
90 && TREE_CODE (expr
) == COMPONENT_REF
)
92 tree field
= TREE_OPERAND (expr
, 1);
93 if (TREE_CODE (field
) == FIELD_DECL
94 && DECL_VIRTUAL_P (field
))
95 return gimple_assign_rhs1 (stmt
);
100 /* Instruments EXPR if needed. If any instrumentation is inserted,
104 instrument_expr (gimple_stmt_iterator gsi
, tree expr
, bool is_write
)
106 tree base
, rhs
, expr_ptr
, builtin_decl
;
113 size
= int_size_in_bytes (TREE_TYPE (expr
));
117 /* For now just avoid instrumenting bit field acceses.
118 TODO: handle bit-fields as if touching the whole field. */
119 HOST_WIDE_INT bitsize
, bitpos
;
121 enum machine_mode mode
;
122 int unsignedp
, reversep
, volatilep
= 0;
123 base
= get_inner_reference (expr
, &bitsize
, &bitpos
, &offset
, &mode
,
124 &unsignedp
, &reversep
, &volatilep
, false);
126 /* No need to instrument accesses to decls that don't escape,
127 they can't escape to other threads then. */
130 struct pt_solution pt
;
131 memset (&pt
, 0, sizeof (pt
));
133 pt
.ipa_escaped
= flag_ipa_pta
!= 0;
135 if (!pt_solution_includes (&pt
, base
))
137 if (!is_global_var (base
) && !may_be_aliased (base
))
141 if (TREE_READONLY (base
)
142 || (TREE_CODE (base
) == VAR_DECL
143 && DECL_HARD_REGISTER (base
)))
147 || bitpos
% (size
* BITS_PER_UNIT
)
148 || bitsize
!= size
* BITS_PER_UNIT
)
151 stmt
= gsi_stmt (gsi
);
152 loc
= gimple_location (stmt
);
153 rhs
= is_vptr_store (stmt
, expr
, is_write
);
154 gcc_checking_assert (rhs
!= NULL
|| is_gimple_addressable (expr
));
155 expr_ptr
= build_fold_addr_expr (unshare_expr (expr
));
157 if (!is_gimple_val (expr_ptr
))
159 g
= gimple_build_assign (make_ssa_name (TREE_TYPE (expr_ptr
), NULL
),
161 expr_ptr
= gimple_assign_lhs (g
);
162 gimple_set_location (g
, loc
);
163 gimple_seq_add_stmt_without_update (&seq
, g
);
166 g
= gimple_build_call (get_memory_access_decl (is_write
, size
),
170 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE
);
171 g
= gimple_build_call (builtin_decl
, 1, expr_ptr
);
173 gimple_set_location (g
, loc
);
174 gimple_seq_add_stmt_without_update (&seq
, g
);
175 /* Instrumentation for assignment of a function result
176 must be inserted after the call. Instrumentation for
177 reads of function arguments must be inserted before the call.
178 That's because the call can contain synchronization. */
179 if (is_gimple_call (stmt
) && is_write
)
181 /* If the call can throw, it must be the last stmt in
182 a basic block, so the instrumented stmts need to be
183 inserted in successor bbs. */
184 if (is_ctrl_altering_stmt (stmt
))
189 e
= find_fallthru_edge (bb
->succs
);
191 gsi_insert_seq_on_edge_immediate (e
, seq
);
194 gsi_insert_seq_after (&gsi
, seq
, GSI_NEW_STMT
);
197 gsi_insert_seq_before (&gsi
, seq
, GSI_SAME_STMT
);
202 /* Actions for sync/atomic builtin transformations. */
203 enum tsan_atomic_action
205 check_last
, add_seq_cst
, add_acquire
, weak_cas
, strong_cas
,
206 bool_cas
, val_cas
, lock_release
, fetch_op
, fetch_op_seq_cst
209 /* Table how to map sync/atomic builtins to their corresponding
211 static const struct tsan_map_atomic
213 enum built_in_function fcode
, tsan_fcode
;
214 enum tsan_atomic_action action
;
216 } tsan_atomic_table
[] =
218 #define TRANSFORM(fcode, tsan_fcode, action, code) \
219 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
220 #define CHECK_LAST(fcode, tsan_fcode) \
221 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
222 #define ADD_SEQ_CST(fcode, tsan_fcode) \
223 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
224 #define ADD_ACQUIRE(fcode, tsan_fcode) \
225 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
226 #define WEAK_CAS(fcode, tsan_fcode) \
227 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
228 #define STRONG_CAS(fcode, tsan_fcode) \
229 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
230 #define BOOL_CAS(fcode, tsan_fcode) \
231 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
232 #define VAL_CAS(fcode, tsan_fcode) \
233 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
234 #define LOCK_RELEASE(fcode, tsan_fcode) \
235 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
236 #define FETCH_OP(fcode, tsan_fcode, code) \
237 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
238 #define FETCH_OPS(fcode, tsan_fcode, code) \
239 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
241 CHECK_LAST (ATOMIC_LOAD_1
, TSAN_ATOMIC8_LOAD
),
242 CHECK_LAST (ATOMIC_LOAD_2
, TSAN_ATOMIC16_LOAD
),
243 CHECK_LAST (ATOMIC_LOAD_4
, TSAN_ATOMIC32_LOAD
),
244 CHECK_LAST (ATOMIC_LOAD_8
, TSAN_ATOMIC64_LOAD
),
245 CHECK_LAST (ATOMIC_LOAD_16
, TSAN_ATOMIC128_LOAD
),
246 CHECK_LAST (ATOMIC_STORE_1
, TSAN_ATOMIC8_STORE
),
247 CHECK_LAST (ATOMIC_STORE_2
, TSAN_ATOMIC16_STORE
),
248 CHECK_LAST (ATOMIC_STORE_4
, TSAN_ATOMIC32_STORE
),
249 CHECK_LAST (ATOMIC_STORE_8
, TSAN_ATOMIC64_STORE
),
250 CHECK_LAST (ATOMIC_STORE_16
, TSAN_ATOMIC128_STORE
),
251 CHECK_LAST (ATOMIC_EXCHANGE_1
, TSAN_ATOMIC8_EXCHANGE
),
252 CHECK_LAST (ATOMIC_EXCHANGE_2
, TSAN_ATOMIC16_EXCHANGE
),
253 CHECK_LAST (ATOMIC_EXCHANGE_4
, TSAN_ATOMIC32_EXCHANGE
),
254 CHECK_LAST (ATOMIC_EXCHANGE_8
, TSAN_ATOMIC64_EXCHANGE
),
255 CHECK_LAST (ATOMIC_EXCHANGE_16
, TSAN_ATOMIC128_EXCHANGE
),
256 CHECK_LAST (ATOMIC_FETCH_ADD_1
, TSAN_ATOMIC8_FETCH_ADD
),
257 CHECK_LAST (ATOMIC_FETCH_ADD_2
, TSAN_ATOMIC16_FETCH_ADD
),
258 CHECK_LAST (ATOMIC_FETCH_ADD_4
, TSAN_ATOMIC32_FETCH_ADD
),
259 CHECK_LAST (ATOMIC_FETCH_ADD_8
, TSAN_ATOMIC64_FETCH_ADD
),
260 CHECK_LAST (ATOMIC_FETCH_ADD_16
, TSAN_ATOMIC128_FETCH_ADD
),
261 CHECK_LAST (ATOMIC_FETCH_SUB_1
, TSAN_ATOMIC8_FETCH_SUB
),
262 CHECK_LAST (ATOMIC_FETCH_SUB_2
, TSAN_ATOMIC16_FETCH_SUB
),
263 CHECK_LAST (ATOMIC_FETCH_SUB_4
, TSAN_ATOMIC32_FETCH_SUB
),
264 CHECK_LAST (ATOMIC_FETCH_SUB_8
, TSAN_ATOMIC64_FETCH_SUB
),
265 CHECK_LAST (ATOMIC_FETCH_SUB_16
, TSAN_ATOMIC128_FETCH_SUB
),
266 CHECK_LAST (ATOMIC_FETCH_AND_1
, TSAN_ATOMIC8_FETCH_AND
),
267 CHECK_LAST (ATOMIC_FETCH_AND_2
, TSAN_ATOMIC16_FETCH_AND
),
268 CHECK_LAST (ATOMIC_FETCH_AND_4
, TSAN_ATOMIC32_FETCH_AND
),
269 CHECK_LAST (ATOMIC_FETCH_AND_8
, TSAN_ATOMIC64_FETCH_AND
),
270 CHECK_LAST (ATOMIC_FETCH_AND_16
, TSAN_ATOMIC128_FETCH_AND
),
271 CHECK_LAST (ATOMIC_FETCH_OR_1
, TSAN_ATOMIC8_FETCH_OR
),
272 CHECK_LAST (ATOMIC_FETCH_OR_2
, TSAN_ATOMIC16_FETCH_OR
),
273 CHECK_LAST (ATOMIC_FETCH_OR_4
, TSAN_ATOMIC32_FETCH_OR
),
274 CHECK_LAST (ATOMIC_FETCH_OR_8
, TSAN_ATOMIC64_FETCH_OR
),
275 CHECK_LAST (ATOMIC_FETCH_OR_16
, TSAN_ATOMIC128_FETCH_OR
),
276 CHECK_LAST (ATOMIC_FETCH_XOR_1
, TSAN_ATOMIC8_FETCH_XOR
),
277 CHECK_LAST (ATOMIC_FETCH_XOR_2
, TSAN_ATOMIC16_FETCH_XOR
),
278 CHECK_LAST (ATOMIC_FETCH_XOR_4
, TSAN_ATOMIC32_FETCH_XOR
),
279 CHECK_LAST (ATOMIC_FETCH_XOR_8
, TSAN_ATOMIC64_FETCH_XOR
),
280 CHECK_LAST (ATOMIC_FETCH_XOR_16
, TSAN_ATOMIC128_FETCH_XOR
),
281 CHECK_LAST (ATOMIC_FETCH_NAND_1
, TSAN_ATOMIC8_FETCH_NAND
),
282 CHECK_LAST (ATOMIC_FETCH_NAND_2
, TSAN_ATOMIC16_FETCH_NAND
),
283 CHECK_LAST (ATOMIC_FETCH_NAND_4
, TSAN_ATOMIC32_FETCH_NAND
),
284 CHECK_LAST (ATOMIC_FETCH_NAND_8
, TSAN_ATOMIC64_FETCH_NAND
),
285 CHECK_LAST (ATOMIC_FETCH_NAND_16
, TSAN_ATOMIC128_FETCH_NAND
),
287 CHECK_LAST (ATOMIC_THREAD_FENCE
, TSAN_ATOMIC_THREAD_FENCE
),
288 CHECK_LAST (ATOMIC_SIGNAL_FENCE
, TSAN_ATOMIC_SIGNAL_FENCE
),
290 FETCH_OP (ATOMIC_ADD_FETCH_1
, TSAN_ATOMIC8_FETCH_ADD
, PLUS_EXPR
),
291 FETCH_OP (ATOMIC_ADD_FETCH_2
, TSAN_ATOMIC16_FETCH_ADD
, PLUS_EXPR
),
292 FETCH_OP (ATOMIC_ADD_FETCH_4
, TSAN_ATOMIC32_FETCH_ADD
, PLUS_EXPR
),
293 FETCH_OP (ATOMIC_ADD_FETCH_8
, TSAN_ATOMIC64_FETCH_ADD
, PLUS_EXPR
),
294 FETCH_OP (ATOMIC_ADD_FETCH_16
, TSAN_ATOMIC128_FETCH_ADD
, PLUS_EXPR
),
295 FETCH_OP (ATOMIC_SUB_FETCH_1
, TSAN_ATOMIC8_FETCH_SUB
, MINUS_EXPR
),
296 FETCH_OP (ATOMIC_SUB_FETCH_2
, TSAN_ATOMIC16_FETCH_SUB
, MINUS_EXPR
),
297 FETCH_OP (ATOMIC_SUB_FETCH_4
, TSAN_ATOMIC32_FETCH_SUB
, MINUS_EXPR
),
298 FETCH_OP (ATOMIC_SUB_FETCH_8
, TSAN_ATOMIC64_FETCH_SUB
, MINUS_EXPR
),
299 FETCH_OP (ATOMIC_SUB_FETCH_16
, TSAN_ATOMIC128_FETCH_SUB
, MINUS_EXPR
),
300 FETCH_OP (ATOMIC_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_AND
, BIT_AND_EXPR
),
301 FETCH_OP (ATOMIC_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_AND
, BIT_AND_EXPR
),
302 FETCH_OP (ATOMIC_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_AND
, BIT_AND_EXPR
),
303 FETCH_OP (ATOMIC_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_AND
, BIT_AND_EXPR
),
304 FETCH_OP (ATOMIC_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_AND
, BIT_AND_EXPR
),
305 FETCH_OP (ATOMIC_OR_FETCH_1
, TSAN_ATOMIC8_FETCH_OR
, BIT_IOR_EXPR
),
306 FETCH_OP (ATOMIC_OR_FETCH_2
, TSAN_ATOMIC16_FETCH_OR
, BIT_IOR_EXPR
),
307 FETCH_OP (ATOMIC_OR_FETCH_4
, TSAN_ATOMIC32_FETCH_OR
, BIT_IOR_EXPR
),
308 FETCH_OP (ATOMIC_OR_FETCH_8
, TSAN_ATOMIC64_FETCH_OR
, BIT_IOR_EXPR
),
309 FETCH_OP (ATOMIC_OR_FETCH_16
, TSAN_ATOMIC128_FETCH_OR
, BIT_IOR_EXPR
),
310 FETCH_OP (ATOMIC_XOR_FETCH_1
, TSAN_ATOMIC8_FETCH_XOR
, BIT_XOR_EXPR
),
311 FETCH_OP (ATOMIC_XOR_FETCH_2
, TSAN_ATOMIC16_FETCH_XOR
, BIT_XOR_EXPR
),
312 FETCH_OP (ATOMIC_XOR_FETCH_4
, TSAN_ATOMIC32_FETCH_XOR
, BIT_XOR_EXPR
),
313 FETCH_OP (ATOMIC_XOR_FETCH_8
, TSAN_ATOMIC64_FETCH_XOR
, BIT_XOR_EXPR
),
314 FETCH_OP (ATOMIC_XOR_FETCH_16
, TSAN_ATOMIC128_FETCH_XOR
, BIT_XOR_EXPR
),
315 FETCH_OP (ATOMIC_NAND_FETCH_1
, TSAN_ATOMIC8_FETCH_NAND
, BIT_NOT_EXPR
),
316 FETCH_OP (ATOMIC_NAND_FETCH_2
, TSAN_ATOMIC16_FETCH_NAND
, BIT_NOT_EXPR
),
317 FETCH_OP (ATOMIC_NAND_FETCH_4
, TSAN_ATOMIC32_FETCH_NAND
, BIT_NOT_EXPR
),
318 FETCH_OP (ATOMIC_NAND_FETCH_8
, TSAN_ATOMIC64_FETCH_NAND
, BIT_NOT_EXPR
),
319 FETCH_OP (ATOMIC_NAND_FETCH_16
, TSAN_ATOMIC128_FETCH_NAND
, BIT_NOT_EXPR
),
321 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1
, TSAN_ATOMIC8_EXCHANGE
),
322 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2
, TSAN_ATOMIC16_EXCHANGE
),
323 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4
, TSAN_ATOMIC32_EXCHANGE
),
324 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8
, TSAN_ATOMIC64_EXCHANGE
),
325 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16
, TSAN_ATOMIC128_EXCHANGE
),
327 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1
, TSAN_ATOMIC8_FETCH_ADD
),
328 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2
, TSAN_ATOMIC16_FETCH_ADD
),
329 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4
, TSAN_ATOMIC32_FETCH_ADD
),
330 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8
, TSAN_ATOMIC64_FETCH_ADD
),
331 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16
, TSAN_ATOMIC128_FETCH_ADD
),
332 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1
, TSAN_ATOMIC8_FETCH_SUB
),
333 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2
, TSAN_ATOMIC16_FETCH_SUB
),
334 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4
, TSAN_ATOMIC32_FETCH_SUB
),
335 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8
, TSAN_ATOMIC64_FETCH_SUB
),
336 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16
, TSAN_ATOMIC128_FETCH_SUB
),
337 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1
, TSAN_ATOMIC8_FETCH_AND
),
338 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2
, TSAN_ATOMIC16_FETCH_AND
),
339 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4
, TSAN_ATOMIC32_FETCH_AND
),
340 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8
, TSAN_ATOMIC64_FETCH_AND
),
341 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16
, TSAN_ATOMIC128_FETCH_AND
),
342 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1
, TSAN_ATOMIC8_FETCH_OR
),
343 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2
, TSAN_ATOMIC16_FETCH_OR
),
344 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4
, TSAN_ATOMIC32_FETCH_OR
),
345 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8
, TSAN_ATOMIC64_FETCH_OR
),
346 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16
, TSAN_ATOMIC128_FETCH_OR
),
347 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1
, TSAN_ATOMIC8_FETCH_XOR
),
348 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2
, TSAN_ATOMIC16_FETCH_XOR
),
349 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4
, TSAN_ATOMIC32_FETCH_XOR
),
350 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8
, TSAN_ATOMIC64_FETCH_XOR
),
351 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16
, TSAN_ATOMIC128_FETCH_XOR
),
352 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1
, TSAN_ATOMIC8_FETCH_NAND
),
353 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2
, TSAN_ATOMIC16_FETCH_NAND
),
354 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4
, TSAN_ATOMIC32_FETCH_NAND
),
355 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8
, TSAN_ATOMIC64_FETCH_NAND
),
356 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16
, TSAN_ATOMIC128_FETCH_NAND
),
358 ADD_SEQ_CST (SYNC_SYNCHRONIZE
, TSAN_ATOMIC_THREAD_FENCE
),
360 FETCH_OPS (SYNC_ADD_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_ADD
, PLUS_EXPR
),
361 FETCH_OPS (SYNC_ADD_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_ADD
, PLUS_EXPR
),
362 FETCH_OPS (SYNC_ADD_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_ADD
, PLUS_EXPR
),
363 FETCH_OPS (SYNC_ADD_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_ADD
, PLUS_EXPR
),
364 FETCH_OPS (SYNC_ADD_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_ADD
, PLUS_EXPR
),
365 FETCH_OPS (SYNC_SUB_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_SUB
, MINUS_EXPR
),
366 FETCH_OPS (SYNC_SUB_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_SUB
, MINUS_EXPR
),
367 FETCH_OPS (SYNC_SUB_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_SUB
, MINUS_EXPR
),
368 FETCH_OPS (SYNC_SUB_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_SUB
, MINUS_EXPR
),
369 FETCH_OPS (SYNC_SUB_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_SUB
, MINUS_EXPR
),
370 FETCH_OPS (SYNC_AND_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_AND
, BIT_AND_EXPR
),
371 FETCH_OPS (SYNC_AND_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_AND
, BIT_AND_EXPR
),
372 FETCH_OPS (SYNC_AND_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_AND
, BIT_AND_EXPR
),
373 FETCH_OPS (SYNC_AND_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_AND
, BIT_AND_EXPR
),
374 FETCH_OPS (SYNC_AND_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_AND
, BIT_AND_EXPR
),
375 FETCH_OPS (SYNC_OR_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_OR
, BIT_IOR_EXPR
),
376 FETCH_OPS (SYNC_OR_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_OR
, BIT_IOR_EXPR
),
377 FETCH_OPS (SYNC_OR_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_OR
, BIT_IOR_EXPR
),
378 FETCH_OPS (SYNC_OR_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_OR
, BIT_IOR_EXPR
),
379 FETCH_OPS (SYNC_OR_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_OR
, BIT_IOR_EXPR
),
380 FETCH_OPS (SYNC_XOR_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_XOR
, BIT_XOR_EXPR
),
381 FETCH_OPS (SYNC_XOR_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_XOR
, BIT_XOR_EXPR
),
382 FETCH_OPS (SYNC_XOR_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_XOR
, BIT_XOR_EXPR
),
383 FETCH_OPS (SYNC_XOR_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_XOR
, BIT_XOR_EXPR
),
384 FETCH_OPS (SYNC_XOR_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_XOR
, BIT_XOR_EXPR
),
385 FETCH_OPS (SYNC_NAND_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_NAND
, BIT_NOT_EXPR
),
386 FETCH_OPS (SYNC_NAND_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_NAND
, BIT_NOT_EXPR
),
387 FETCH_OPS (SYNC_NAND_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_NAND
, BIT_NOT_EXPR
),
388 FETCH_OPS (SYNC_NAND_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_NAND
, BIT_NOT_EXPR
),
389 FETCH_OPS (SYNC_NAND_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_NAND
, BIT_NOT_EXPR
),
391 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK
),
392 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2
, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK
),
393 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4
, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK
),
394 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8
, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK
),
395 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16
, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK
),
397 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
398 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2
,
399 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
400 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4
,
401 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
402 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8
,
403 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
404 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16
,
405 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
407 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1
,
408 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
409 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2
,
410 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
411 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4
,
412 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
413 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8
,
414 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
415 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16
,
416 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
418 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
419 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2
, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
420 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4
, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
421 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8
, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
422 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16
,
423 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
425 LOCK_RELEASE (SYNC_LOCK_RELEASE_1
, TSAN_ATOMIC8_STORE
),
426 LOCK_RELEASE (SYNC_LOCK_RELEASE_2
, TSAN_ATOMIC16_STORE
),
427 LOCK_RELEASE (SYNC_LOCK_RELEASE_4
, TSAN_ATOMIC32_STORE
),
428 LOCK_RELEASE (SYNC_LOCK_RELEASE_8
, TSAN_ATOMIC64_STORE
),
429 LOCK_RELEASE (SYNC_LOCK_RELEASE_16
, TSAN_ATOMIC128_STORE
)
432 /* Instrument an atomic builtin. */
435 instrument_builtin_call (gimple_stmt_iterator
*gsi
)
437 gimple stmt
= gsi_stmt (*gsi
), g
;
438 tree callee
= gimple_call_fndecl (stmt
), last_arg
, args
[6], t
, lhs
;
439 enum built_in_function fcode
= DECL_FUNCTION_CODE (callee
);
440 unsigned int i
, num
= gimple_call_num_args (stmt
), j
;
441 for (j
= 0; j
< 6 && j
< num
; j
++)
442 args
[j
] = gimple_call_arg (stmt
, j
);
443 for (i
= 0; i
< ARRAY_SIZE (tsan_atomic_table
); i
++)
444 if (fcode
!= tsan_atomic_table
[i
].fcode
)
448 tree decl
= builtin_decl_implicit (tsan_atomic_table
[i
].tsan_fcode
);
449 if (decl
== NULL_TREE
)
451 switch (tsan_atomic_table
[i
].action
)
455 last_arg
= gimple_call_arg (stmt
, num
- 1);
456 if (!tree_fits_uhwi_p (last_arg
)
457 || tree_to_uhwi (last_arg
) > MEMMODEL_SEQ_CST
)
459 gimple_call_set_fndecl (stmt
, decl
);
461 if (tsan_atomic_table
[i
].action
== fetch_op
)
463 args
[1] = gimple_call_arg (stmt
, 1);
469 case fetch_op_seq_cst
:
470 gcc_assert (num
<= 2);
471 for (j
= 0; j
< num
; j
++)
472 args
[j
] = gimple_call_arg (stmt
, j
);
475 args
[num
] = build_int_cst (NULL_TREE
,
476 tsan_atomic_table
[i
].action
480 update_gimple_call (gsi
, decl
, num
+ 1, args
[0], args
[1], args
[2]);
481 stmt
= gsi_stmt (*gsi
);
482 if (tsan_atomic_table
[i
].action
== fetch_op_seq_cst
)
485 lhs
= gimple_call_lhs (stmt
);
486 if (lhs
== NULL_TREE
)
488 if (!useless_type_conversion_p (TREE_TYPE (lhs
),
489 TREE_TYPE (args
[1])))
491 tree var
= make_ssa_name (TREE_TYPE (lhs
), NULL
);
492 g
= gimple_build_assign_with_ops (NOP_EXPR
, var
,
494 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
497 gimple_call_set_lhs (stmt
,
498 make_ssa_name (TREE_TYPE (lhs
), NULL
));
499 /* BIT_NOT_EXPR stands for NAND. */
500 if (tsan_atomic_table
[i
].code
== BIT_NOT_EXPR
)
502 tree var
= make_ssa_name (TREE_TYPE (lhs
), NULL
);
503 g
= gimple_build_assign_with_ops (BIT_AND_EXPR
, var
,
504 gimple_call_lhs (stmt
),
506 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
507 g
= gimple_build_assign_with_ops (BIT_NOT_EXPR
, lhs
, var
,
511 g
= gimple_build_assign_with_ops (tsan_atomic_table
[i
].code
,
513 gimple_call_lhs (stmt
),
516 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
520 if (!integer_nonzerop (gimple_call_arg (stmt
, 3)))
524 gcc_assert (num
== 6);
525 for (j
= 0; j
< 6; j
++)
526 args
[j
] = gimple_call_arg (stmt
, j
);
527 if (!tree_fits_uhwi_p (args
[4])
528 || tree_to_uhwi (args
[4]) > MEMMODEL_SEQ_CST
)
530 if (!tree_fits_uhwi_p (args
[5])
531 || tree_to_uhwi (args
[5]) > MEMMODEL_SEQ_CST
)
533 update_gimple_call (gsi
, decl
, 5, args
[0], args
[1], args
[2],
538 gcc_assert (num
== 3);
539 for (j
= 0; j
< 3; j
++)
540 args
[j
] = gimple_call_arg (stmt
, j
);
541 t
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
542 t
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t
)));
543 t
= create_tmp_var (t
, NULL
);
544 mark_addressable (t
);
545 if (!useless_type_conversion_p (TREE_TYPE (t
),
546 TREE_TYPE (args
[1])))
548 g
= gimple_build_assign_with_ops (NOP_EXPR
,
549 make_ssa_name (TREE_TYPE (t
),
552 gsi_insert_before (gsi
, g
, GSI_SAME_STMT
);
553 args
[1] = gimple_assign_lhs (g
);
555 g
= gimple_build_assign (t
, args
[1]);
556 gsi_insert_before (gsi
, g
, GSI_SAME_STMT
);
557 lhs
= gimple_call_lhs (stmt
);
558 update_gimple_call (gsi
, decl
, 5, args
[0],
559 build_fold_addr_expr (t
), args
[2],
560 build_int_cst (NULL_TREE
,
562 build_int_cst (NULL_TREE
,
564 if (tsan_atomic_table
[i
].action
== val_cas
&& lhs
)
567 stmt
= gsi_stmt (*gsi
);
568 g
= gimple_build_assign (make_ssa_name (TREE_TYPE (t
), NULL
),
570 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
571 t
= make_ssa_name (TREE_TYPE (TREE_TYPE (decl
)), stmt
);
572 cond
= build2 (NE_EXPR
, boolean_type_node
, t
,
573 build_int_cst (TREE_TYPE (t
), 0));
574 g
= gimple_build_assign_with_ops (COND_EXPR
, lhs
, cond
,
576 gimple_assign_lhs (g
));
577 gimple_call_set_lhs (stmt
, t
);
579 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
583 gcc_assert (num
== 1);
584 t
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
585 t
= TREE_VALUE (TREE_CHAIN (t
));
586 update_gimple_call (gsi
, decl
, 3, gimple_call_arg (stmt
, 0),
587 build_int_cst (t
, 0),
588 build_int_cst (NULL_TREE
,
597 /* Instruments the gimple pointed to by GSI. Return
598 true if func entry/exit should be instrumented. */
601 instrument_gimple (gimple_stmt_iterator
*gsi
)
605 bool instrumented
= false;
607 stmt
= gsi_stmt (*gsi
);
608 if (is_gimple_call (stmt
)
609 && (gimple_call_fndecl (stmt
)
610 != builtin_decl_implicit (BUILT_IN_TSAN_INIT
)))
612 if (gimple_call_builtin_p (stmt
, BUILT_IN_NORMAL
))
613 instrument_builtin_call (gsi
);
616 else if (is_gimple_assign (stmt
)
617 && !gimple_clobber_p (stmt
))
619 if (gimple_store_p (stmt
))
621 lhs
= gimple_assign_lhs (stmt
);
622 instrumented
= instrument_expr (*gsi
, lhs
, true);
624 if (gimple_assign_load_p (stmt
))
626 rhs
= gimple_assign_rhs1 (stmt
);
627 instrumented
= instrument_expr (*gsi
, rhs
, false);
633 /* Instruments all interesting memory accesses in the current function.
634 Return true if func entry/exit should be instrumented. */
637 instrument_memory_accesses (void)
640 gimple_stmt_iterator gsi
;
641 bool fentry_exit_instrument
= false;
643 FOR_EACH_BB_FN (bb
, cfun
)
644 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
645 fentry_exit_instrument
|= instrument_gimple (&gsi
);
646 return fentry_exit_instrument
;
649 /* Instruments function entry. */
652 instrument_func_entry (void)
655 gimple_stmt_iterator gsi
;
656 tree ret_addr
, builtin_decl
;
659 succ_bb
= single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun
));
660 gsi
= gsi_after_labels (succ_bb
);
662 builtin_decl
= builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS
);
663 g
= gimple_build_call (builtin_decl
, 1, integer_zero_node
);
664 ret_addr
= make_ssa_name (ptr_type_node
, NULL
);
665 gimple_call_set_lhs (g
, ret_addr
);
666 gimple_set_location (g
, cfun
->function_start_locus
);
667 gsi_insert_before (&gsi
, g
, GSI_SAME_STMT
);
669 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY
);
670 g
= gimple_build_call (builtin_decl
, 1, ret_addr
);
671 gimple_set_location (g
, cfun
->function_start_locus
);
672 gsi_insert_before (&gsi
, g
, GSI_SAME_STMT
);
675 /* Instruments function exits. */
678 instrument_func_exit (void)
682 gimple_stmt_iterator gsi
;
688 /* Find all function exits. */
689 exit_bb
= EXIT_BLOCK_PTR_FOR_FN (cfun
);
690 FOR_EACH_EDGE (e
, ei
, exit_bb
->preds
)
692 gsi
= gsi_last_bb (e
->src
);
693 stmt
= gsi_stmt (gsi
);
694 gcc_assert (gimple_code (stmt
) == GIMPLE_RETURN
695 || gimple_call_builtin_p (stmt
, BUILT_IN_RETURN
));
696 loc
= gimple_location (stmt
);
697 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT
);
698 g
= gimple_build_call (builtin_decl
, 0);
699 gimple_set_location (g
, loc
);
700 gsi_insert_before (&gsi
, g
, GSI_SAME_STMT
);
704 /* ThreadSanitizer instrumentation pass. */
709 initialize_sanitizer_builtins ();
710 if (instrument_memory_accesses ())
712 instrument_func_entry ();
713 instrument_func_exit ();
718 /* Inserts __tsan_init () into the list of CTORs. */
721 tsan_finish_file (void)
723 tree ctor_statements
= NULL_TREE
;
725 initialize_sanitizer_builtins ();
726 tree init_decl
= builtin_decl_implicit (BUILT_IN_TSAN_INIT
);
727 append_to_statement_list (build_call_expr (init_decl
, 0),
729 cgraph_build_static_cdtor ('I', ctor_statements
,
730 MAX_RESERVED_INIT_PRIORITY
- 1);
733 /* The pass descriptor. */
737 const pass_data pass_data_tsan
=
739 GIMPLE_PASS
, /* type */
741 OPTGROUP_NONE
, /* optinfo_flags */
743 ( PROP_ssa
| PROP_cfg
), /* properties_required */
744 0, /* properties_provided */
745 0, /* properties_destroyed */
746 0, /* todo_flags_start */
747 TODO_update_ssa
, /* todo_flags_finish */
750 class pass_tsan
: public gimple_opt_pass
753 pass_tsan (gcc::context
*ctxt
)
754 : gimple_opt_pass (pass_data_tsan
, ctxt
)
757 /* opt_pass methods: */
758 opt_pass
* clone () { return new pass_tsan (m_ctxt
); }
759 virtual bool gate (function
*)
761 return (flag_sanitize
& SANITIZE_THREAD
) != 0;
764 virtual unsigned int execute (function
*) { return tsan_pass (); }
766 }; // class pass_tsan
771 make_pass_tsan (gcc::context
*ctxt
)
773 return new pass_tsan (ctxt
);
778 const pass_data pass_data_tsan_O0
=
780 GIMPLE_PASS
, /* type */
782 OPTGROUP_NONE
, /* optinfo_flags */
784 ( PROP_ssa
| PROP_cfg
), /* properties_required */
785 0, /* properties_provided */
786 0, /* properties_destroyed */
787 0, /* todo_flags_start */
788 TODO_update_ssa
, /* todo_flags_finish */
791 class pass_tsan_O0
: public gimple_opt_pass
794 pass_tsan_O0 (gcc::context
*ctxt
)
795 : gimple_opt_pass (pass_data_tsan_O0
, ctxt
)
798 /* opt_pass methods: */
799 virtual bool gate (function
*)
801 return (flag_sanitize
& SANITIZE_THREAD
) != 0 && !optimize
;
804 virtual unsigned int execute (function
*) { return tsan_pass (); }
806 }; // class pass_tsan_O0
811 make_pass_tsan_O0 (gcc::context
*ctxt
)
813 return new pass_tsan_O0 (ctxt
);