1 /* GCC instrumentation plugin for ThreadSanitizer.
2 Copyright (C) 2011-2018 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"
30 #include "tree-pass.h"
33 #include "fold-const.h"
35 #include "gimple-iterator.h"
36 #include "gimplify-me.h"
38 #include "tree-iterator.h"
39 #include "tree-ssa-propagate.h"
40 #include "tree-ssa-loop-ivopts.h"
43 #include "stringpool.h"
49 /* Number of instrumented memory accesses in the current function. */
51 /* Builds the following decl
52 void __tsan_read/writeX (void *addr); */
55 get_memory_access_decl (bool is_write
, unsigned size
)
57 enum built_in_function fcode
;
60 fcode
= is_write
? BUILT_IN_TSAN_WRITE1
61 : BUILT_IN_TSAN_READ1
;
63 fcode
= is_write
? BUILT_IN_TSAN_WRITE2
64 : BUILT_IN_TSAN_READ2
;
66 fcode
= is_write
? BUILT_IN_TSAN_WRITE4
67 : BUILT_IN_TSAN_READ4
;
69 fcode
= is_write
? BUILT_IN_TSAN_WRITE8
70 : BUILT_IN_TSAN_READ8
;
72 fcode
= is_write
? BUILT_IN_TSAN_WRITE16
73 : BUILT_IN_TSAN_READ16
;
75 return builtin_decl_implicit (fcode
);
78 /* Check as to whether EXPR refers to a store to vptr. */
81 is_vptr_store (gimple
*stmt
, tree expr
, bool is_write
)
84 && gimple_assign_single_p (stmt
)
85 && TREE_CODE (expr
) == COMPONENT_REF
)
87 tree field
= TREE_OPERAND (expr
, 1);
88 if (TREE_CODE (field
) == FIELD_DECL
89 && DECL_VIRTUAL_P (field
))
90 return gimple_assign_rhs1 (stmt
);
95 /* Instruments EXPR if needed. If any instrumentation is inserted,
99 instrument_expr (gimple_stmt_iterator gsi
, tree expr
, bool is_write
)
101 tree base
, rhs
, expr_ptr
, builtin_decl
;
109 size
= int_size_in_bytes (TREE_TYPE (expr
));
113 poly_int64 unused_bitsize
, unused_bitpos
;
116 int unsignedp
, reversep
, volatilep
= 0;
117 base
= get_inner_reference (expr
, &unused_bitsize
, &unused_bitpos
, &offset
,
118 &mode
, &unsignedp
, &reversep
, &volatilep
);
120 /* No need to instrument accesses to decls that don't escape,
121 they can't escape to other threads then. */
122 if (DECL_P (base
) && !is_global_var (base
))
124 struct pt_solution pt
;
125 memset (&pt
, 0, sizeof (pt
));
127 pt
.ipa_escaped
= flag_ipa_pta
!= 0;
128 if (!pt_solution_includes (&pt
, base
))
130 if (!may_be_aliased (base
))
134 if (TREE_READONLY (base
) || (VAR_P (base
) && DECL_HARD_REGISTER (base
)))
137 stmt
= gsi_stmt (gsi
);
138 loc
= gimple_location (stmt
);
139 rhs
= is_vptr_store (stmt
, expr
, is_write
);
141 if ((TREE_CODE (expr
) == COMPONENT_REF
142 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr
, 1)))
143 || TREE_CODE (expr
) == BIT_FIELD_REF
)
145 HOST_WIDE_INT bitpos
, bitsize
;
146 base
= TREE_OPERAND (expr
, 0);
147 if (TREE_CODE (expr
) == COMPONENT_REF
)
149 expr
= TREE_OPERAND (expr
, 1);
150 if (is_write
&& DECL_BIT_FIELD_REPRESENTATIVE (expr
))
151 expr
= DECL_BIT_FIELD_REPRESENTATIVE (expr
);
152 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr
))
153 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr
))
154 || !tree_fits_uhwi_p (DECL_SIZE (expr
)))
156 bitpos
= tree_to_uhwi (DECL_FIELD_OFFSET (expr
)) * BITS_PER_UNIT
157 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr
));
158 bitsize
= tree_to_uhwi (DECL_SIZE (expr
));
162 if (!tree_fits_uhwi_p (TREE_OPERAND (expr
, 2))
163 || !tree_fits_uhwi_p (TREE_OPERAND (expr
, 1)))
165 bitpos
= tree_to_uhwi (TREE_OPERAND (expr
, 2));
166 bitsize
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
168 if (bitpos
< 0 || bitsize
<= 0)
170 size
= (bitpos
% BITS_PER_UNIT
+ bitsize
+ BITS_PER_UNIT
- 1)
172 if (may_be_nonaddressable_p (base
))
174 align
= get_object_alignment (base
);
175 if (align
< BITS_PER_UNIT
)
177 bitpos
= bitpos
& ~(BITS_PER_UNIT
- 1);
178 if ((align
- 1) & bitpos
)
180 align
= (align
- 1) & bitpos
;
181 align
= least_bit_hwi (align
);
183 expr
= build_fold_addr_expr (unshare_expr (base
));
184 expr
= build2 (MEM_REF
, char_type_node
, expr
,
185 build_int_cst (TREE_TYPE (expr
), bitpos
/ BITS_PER_UNIT
));
186 expr_ptr
= build_fold_addr_expr (expr
);
190 if (may_be_nonaddressable_p (expr
))
192 align
= get_object_alignment (expr
);
193 if (align
< BITS_PER_UNIT
)
195 expr_ptr
= build_fold_addr_expr (unshare_expr (expr
));
197 expr_ptr
= force_gimple_operand (expr_ptr
, &seq
, true, NULL_TREE
);
198 if ((size
& (size
- 1)) != 0 || size
> 16
199 || align
< MIN (size
, 8) * BITS_PER_UNIT
)
201 builtin_decl
= builtin_decl_implicit (is_write
202 ? BUILT_IN_TSAN_WRITE_RANGE
203 : BUILT_IN_TSAN_READ_RANGE
);
204 g
= gimple_build_call (builtin_decl
, 2, expr_ptr
, size_int (size
));
206 else if (rhs
== NULL
)
207 g
= gimple_build_call (get_memory_access_decl (is_write
, size
),
211 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE
);
212 g
= gimple_build_call (builtin_decl
, 2, expr_ptr
, unshare_expr (rhs
));
214 gimple_set_location (g
, loc
);
215 gimple_seq_add_stmt_without_update (&seq
, g
);
216 /* Instrumentation for assignment of a function result
217 must be inserted after the call. Instrumentation for
218 reads of function arguments must be inserted before the call.
219 That's because the call can contain synchronization. */
220 if (is_gimple_call (stmt
) && is_write
)
222 /* If the call can throw, it must be the last stmt in
223 a basic block, so the instrumented stmts need to be
224 inserted in successor bbs. */
225 if (is_ctrl_altering_stmt (stmt
))
230 e
= find_fallthru_edge (bb
->succs
);
232 gsi_insert_seq_on_edge_immediate (e
, seq
);
235 gsi_insert_seq_after (&gsi
, seq
, GSI_NEW_STMT
);
238 gsi_insert_seq_before (&gsi
, seq
, GSI_SAME_STMT
);
243 /* Actions for sync/atomic builtin transformations. */
244 enum tsan_atomic_action
246 check_last
, add_seq_cst
, add_acquire
, weak_cas
, strong_cas
,
247 bool_cas
, val_cas
, lock_release
, fetch_op
, fetch_op_seq_cst
,
248 bool_clear
, bool_test_and_set
251 /* Table how to map sync/atomic builtins to their corresponding
253 static const struct tsan_map_atomic
255 enum built_in_function fcode
, tsan_fcode
;
256 enum tsan_atomic_action action
;
258 } tsan_atomic_table
[] =
260 #define TRANSFORM(fcode, tsan_fcode, action, code) \
261 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
262 #define CHECK_LAST(fcode, tsan_fcode) \
263 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
264 #define ADD_SEQ_CST(fcode, tsan_fcode) \
265 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
266 #define ADD_ACQUIRE(fcode, tsan_fcode) \
267 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
268 #define WEAK_CAS(fcode, tsan_fcode) \
269 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
270 #define STRONG_CAS(fcode, tsan_fcode) \
271 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
272 #define BOOL_CAS(fcode, tsan_fcode) \
273 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
274 #define VAL_CAS(fcode, tsan_fcode) \
275 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
276 #define LOCK_RELEASE(fcode, tsan_fcode) \
277 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
278 #define FETCH_OP(fcode, tsan_fcode, code) \
279 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
280 #define FETCH_OPS(fcode, tsan_fcode, code) \
281 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
282 #define BOOL_CLEAR(fcode, tsan_fcode) \
283 TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK)
284 #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \
285 TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK)
287 CHECK_LAST (ATOMIC_LOAD_1
, TSAN_ATOMIC8_LOAD
),
288 CHECK_LAST (ATOMIC_LOAD_2
, TSAN_ATOMIC16_LOAD
),
289 CHECK_LAST (ATOMIC_LOAD_4
, TSAN_ATOMIC32_LOAD
),
290 CHECK_LAST (ATOMIC_LOAD_8
, TSAN_ATOMIC64_LOAD
),
291 CHECK_LAST (ATOMIC_LOAD_16
, TSAN_ATOMIC128_LOAD
),
292 CHECK_LAST (ATOMIC_STORE_1
, TSAN_ATOMIC8_STORE
),
293 CHECK_LAST (ATOMIC_STORE_2
, TSAN_ATOMIC16_STORE
),
294 CHECK_LAST (ATOMIC_STORE_4
, TSAN_ATOMIC32_STORE
),
295 CHECK_LAST (ATOMIC_STORE_8
, TSAN_ATOMIC64_STORE
),
296 CHECK_LAST (ATOMIC_STORE_16
, TSAN_ATOMIC128_STORE
),
297 CHECK_LAST (ATOMIC_EXCHANGE_1
, TSAN_ATOMIC8_EXCHANGE
),
298 CHECK_LAST (ATOMIC_EXCHANGE_2
, TSAN_ATOMIC16_EXCHANGE
),
299 CHECK_LAST (ATOMIC_EXCHANGE_4
, TSAN_ATOMIC32_EXCHANGE
),
300 CHECK_LAST (ATOMIC_EXCHANGE_8
, TSAN_ATOMIC64_EXCHANGE
),
301 CHECK_LAST (ATOMIC_EXCHANGE_16
, TSAN_ATOMIC128_EXCHANGE
),
302 CHECK_LAST (ATOMIC_FETCH_ADD_1
, TSAN_ATOMIC8_FETCH_ADD
),
303 CHECK_LAST (ATOMIC_FETCH_ADD_2
, TSAN_ATOMIC16_FETCH_ADD
),
304 CHECK_LAST (ATOMIC_FETCH_ADD_4
, TSAN_ATOMIC32_FETCH_ADD
),
305 CHECK_LAST (ATOMIC_FETCH_ADD_8
, TSAN_ATOMIC64_FETCH_ADD
),
306 CHECK_LAST (ATOMIC_FETCH_ADD_16
, TSAN_ATOMIC128_FETCH_ADD
),
307 CHECK_LAST (ATOMIC_FETCH_SUB_1
, TSAN_ATOMIC8_FETCH_SUB
),
308 CHECK_LAST (ATOMIC_FETCH_SUB_2
, TSAN_ATOMIC16_FETCH_SUB
),
309 CHECK_LAST (ATOMIC_FETCH_SUB_4
, TSAN_ATOMIC32_FETCH_SUB
),
310 CHECK_LAST (ATOMIC_FETCH_SUB_8
, TSAN_ATOMIC64_FETCH_SUB
),
311 CHECK_LAST (ATOMIC_FETCH_SUB_16
, TSAN_ATOMIC128_FETCH_SUB
),
312 CHECK_LAST (ATOMIC_FETCH_AND_1
, TSAN_ATOMIC8_FETCH_AND
),
313 CHECK_LAST (ATOMIC_FETCH_AND_2
, TSAN_ATOMIC16_FETCH_AND
),
314 CHECK_LAST (ATOMIC_FETCH_AND_4
, TSAN_ATOMIC32_FETCH_AND
),
315 CHECK_LAST (ATOMIC_FETCH_AND_8
, TSAN_ATOMIC64_FETCH_AND
),
316 CHECK_LAST (ATOMIC_FETCH_AND_16
, TSAN_ATOMIC128_FETCH_AND
),
317 CHECK_LAST (ATOMIC_FETCH_OR_1
, TSAN_ATOMIC8_FETCH_OR
),
318 CHECK_LAST (ATOMIC_FETCH_OR_2
, TSAN_ATOMIC16_FETCH_OR
),
319 CHECK_LAST (ATOMIC_FETCH_OR_4
, TSAN_ATOMIC32_FETCH_OR
),
320 CHECK_LAST (ATOMIC_FETCH_OR_8
, TSAN_ATOMIC64_FETCH_OR
),
321 CHECK_LAST (ATOMIC_FETCH_OR_16
, TSAN_ATOMIC128_FETCH_OR
),
322 CHECK_LAST (ATOMIC_FETCH_XOR_1
, TSAN_ATOMIC8_FETCH_XOR
),
323 CHECK_LAST (ATOMIC_FETCH_XOR_2
, TSAN_ATOMIC16_FETCH_XOR
),
324 CHECK_LAST (ATOMIC_FETCH_XOR_4
, TSAN_ATOMIC32_FETCH_XOR
),
325 CHECK_LAST (ATOMIC_FETCH_XOR_8
, TSAN_ATOMIC64_FETCH_XOR
),
326 CHECK_LAST (ATOMIC_FETCH_XOR_16
, TSAN_ATOMIC128_FETCH_XOR
),
327 CHECK_LAST (ATOMIC_FETCH_NAND_1
, TSAN_ATOMIC8_FETCH_NAND
),
328 CHECK_LAST (ATOMIC_FETCH_NAND_2
, TSAN_ATOMIC16_FETCH_NAND
),
329 CHECK_LAST (ATOMIC_FETCH_NAND_4
, TSAN_ATOMIC32_FETCH_NAND
),
330 CHECK_LAST (ATOMIC_FETCH_NAND_8
, TSAN_ATOMIC64_FETCH_NAND
),
331 CHECK_LAST (ATOMIC_FETCH_NAND_16
, TSAN_ATOMIC128_FETCH_NAND
),
333 CHECK_LAST (ATOMIC_THREAD_FENCE
, TSAN_ATOMIC_THREAD_FENCE
),
334 CHECK_LAST (ATOMIC_SIGNAL_FENCE
, TSAN_ATOMIC_SIGNAL_FENCE
),
336 FETCH_OP (ATOMIC_ADD_FETCH_1
, TSAN_ATOMIC8_FETCH_ADD
, PLUS_EXPR
),
337 FETCH_OP (ATOMIC_ADD_FETCH_2
, TSAN_ATOMIC16_FETCH_ADD
, PLUS_EXPR
),
338 FETCH_OP (ATOMIC_ADD_FETCH_4
, TSAN_ATOMIC32_FETCH_ADD
, PLUS_EXPR
),
339 FETCH_OP (ATOMIC_ADD_FETCH_8
, TSAN_ATOMIC64_FETCH_ADD
, PLUS_EXPR
),
340 FETCH_OP (ATOMIC_ADD_FETCH_16
, TSAN_ATOMIC128_FETCH_ADD
, PLUS_EXPR
),
341 FETCH_OP (ATOMIC_SUB_FETCH_1
, TSAN_ATOMIC8_FETCH_SUB
, MINUS_EXPR
),
342 FETCH_OP (ATOMIC_SUB_FETCH_2
, TSAN_ATOMIC16_FETCH_SUB
, MINUS_EXPR
),
343 FETCH_OP (ATOMIC_SUB_FETCH_4
, TSAN_ATOMIC32_FETCH_SUB
, MINUS_EXPR
),
344 FETCH_OP (ATOMIC_SUB_FETCH_8
, TSAN_ATOMIC64_FETCH_SUB
, MINUS_EXPR
),
345 FETCH_OP (ATOMIC_SUB_FETCH_16
, TSAN_ATOMIC128_FETCH_SUB
, MINUS_EXPR
),
346 FETCH_OP (ATOMIC_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_AND
, BIT_AND_EXPR
),
347 FETCH_OP (ATOMIC_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_AND
, BIT_AND_EXPR
),
348 FETCH_OP (ATOMIC_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_AND
, BIT_AND_EXPR
),
349 FETCH_OP (ATOMIC_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_AND
, BIT_AND_EXPR
),
350 FETCH_OP (ATOMIC_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_AND
, BIT_AND_EXPR
),
351 FETCH_OP (ATOMIC_OR_FETCH_1
, TSAN_ATOMIC8_FETCH_OR
, BIT_IOR_EXPR
),
352 FETCH_OP (ATOMIC_OR_FETCH_2
, TSAN_ATOMIC16_FETCH_OR
, BIT_IOR_EXPR
),
353 FETCH_OP (ATOMIC_OR_FETCH_4
, TSAN_ATOMIC32_FETCH_OR
, BIT_IOR_EXPR
),
354 FETCH_OP (ATOMIC_OR_FETCH_8
, TSAN_ATOMIC64_FETCH_OR
, BIT_IOR_EXPR
),
355 FETCH_OP (ATOMIC_OR_FETCH_16
, TSAN_ATOMIC128_FETCH_OR
, BIT_IOR_EXPR
),
356 FETCH_OP (ATOMIC_XOR_FETCH_1
, TSAN_ATOMIC8_FETCH_XOR
, BIT_XOR_EXPR
),
357 FETCH_OP (ATOMIC_XOR_FETCH_2
, TSAN_ATOMIC16_FETCH_XOR
, BIT_XOR_EXPR
),
358 FETCH_OP (ATOMIC_XOR_FETCH_4
, TSAN_ATOMIC32_FETCH_XOR
, BIT_XOR_EXPR
),
359 FETCH_OP (ATOMIC_XOR_FETCH_8
, TSAN_ATOMIC64_FETCH_XOR
, BIT_XOR_EXPR
),
360 FETCH_OP (ATOMIC_XOR_FETCH_16
, TSAN_ATOMIC128_FETCH_XOR
, BIT_XOR_EXPR
),
361 FETCH_OP (ATOMIC_NAND_FETCH_1
, TSAN_ATOMIC8_FETCH_NAND
, BIT_NOT_EXPR
),
362 FETCH_OP (ATOMIC_NAND_FETCH_2
, TSAN_ATOMIC16_FETCH_NAND
, BIT_NOT_EXPR
),
363 FETCH_OP (ATOMIC_NAND_FETCH_4
, TSAN_ATOMIC32_FETCH_NAND
, BIT_NOT_EXPR
),
364 FETCH_OP (ATOMIC_NAND_FETCH_8
, TSAN_ATOMIC64_FETCH_NAND
, BIT_NOT_EXPR
),
365 FETCH_OP (ATOMIC_NAND_FETCH_16
, TSAN_ATOMIC128_FETCH_NAND
, BIT_NOT_EXPR
),
367 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1
, TSAN_ATOMIC8_EXCHANGE
),
368 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2
, TSAN_ATOMIC16_EXCHANGE
),
369 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4
, TSAN_ATOMIC32_EXCHANGE
),
370 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8
, TSAN_ATOMIC64_EXCHANGE
),
371 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16
, TSAN_ATOMIC128_EXCHANGE
),
373 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1
, TSAN_ATOMIC8_FETCH_ADD
),
374 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2
, TSAN_ATOMIC16_FETCH_ADD
),
375 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4
, TSAN_ATOMIC32_FETCH_ADD
),
376 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8
, TSAN_ATOMIC64_FETCH_ADD
),
377 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16
, TSAN_ATOMIC128_FETCH_ADD
),
378 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1
, TSAN_ATOMIC8_FETCH_SUB
),
379 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2
, TSAN_ATOMIC16_FETCH_SUB
),
380 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4
, TSAN_ATOMIC32_FETCH_SUB
),
381 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8
, TSAN_ATOMIC64_FETCH_SUB
),
382 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16
, TSAN_ATOMIC128_FETCH_SUB
),
383 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1
, TSAN_ATOMIC8_FETCH_AND
),
384 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2
, TSAN_ATOMIC16_FETCH_AND
),
385 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4
, TSAN_ATOMIC32_FETCH_AND
),
386 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8
, TSAN_ATOMIC64_FETCH_AND
),
387 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16
, TSAN_ATOMIC128_FETCH_AND
),
388 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1
, TSAN_ATOMIC8_FETCH_OR
),
389 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2
, TSAN_ATOMIC16_FETCH_OR
),
390 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4
, TSAN_ATOMIC32_FETCH_OR
),
391 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8
, TSAN_ATOMIC64_FETCH_OR
),
392 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16
, TSAN_ATOMIC128_FETCH_OR
),
393 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1
, TSAN_ATOMIC8_FETCH_XOR
),
394 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2
, TSAN_ATOMIC16_FETCH_XOR
),
395 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4
, TSAN_ATOMIC32_FETCH_XOR
),
396 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8
, TSAN_ATOMIC64_FETCH_XOR
),
397 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16
, TSAN_ATOMIC128_FETCH_XOR
),
398 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1
, TSAN_ATOMIC8_FETCH_NAND
),
399 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2
, TSAN_ATOMIC16_FETCH_NAND
),
400 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4
, TSAN_ATOMIC32_FETCH_NAND
),
401 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8
, TSAN_ATOMIC64_FETCH_NAND
),
402 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16
, TSAN_ATOMIC128_FETCH_NAND
),
404 ADD_SEQ_CST (SYNC_SYNCHRONIZE
, TSAN_ATOMIC_THREAD_FENCE
),
406 FETCH_OPS (SYNC_ADD_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_ADD
, PLUS_EXPR
),
407 FETCH_OPS (SYNC_ADD_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_ADD
, PLUS_EXPR
),
408 FETCH_OPS (SYNC_ADD_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_ADD
, PLUS_EXPR
),
409 FETCH_OPS (SYNC_ADD_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_ADD
, PLUS_EXPR
),
410 FETCH_OPS (SYNC_ADD_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_ADD
, PLUS_EXPR
),
411 FETCH_OPS (SYNC_SUB_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_SUB
, MINUS_EXPR
),
412 FETCH_OPS (SYNC_SUB_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_SUB
, MINUS_EXPR
),
413 FETCH_OPS (SYNC_SUB_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_SUB
, MINUS_EXPR
),
414 FETCH_OPS (SYNC_SUB_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_SUB
, MINUS_EXPR
),
415 FETCH_OPS (SYNC_SUB_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_SUB
, MINUS_EXPR
),
416 FETCH_OPS (SYNC_AND_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_AND
, BIT_AND_EXPR
),
417 FETCH_OPS (SYNC_AND_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_AND
, BIT_AND_EXPR
),
418 FETCH_OPS (SYNC_AND_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_AND
, BIT_AND_EXPR
),
419 FETCH_OPS (SYNC_AND_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_AND
, BIT_AND_EXPR
),
420 FETCH_OPS (SYNC_AND_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_AND
, BIT_AND_EXPR
),
421 FETCH_OPS (SYNC_OR_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_OR
, BIT_IOR_EXPR
),
422 FETCH_OPS (SYNC_OR_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_OR
, BIT_IOR_EXPR
),
423 FETCH_OPS (SYNC_OR_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_OR
, BIT_IOR_EXPR
),
424 FETCH_OPS (SYNC_OR_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_OR
, BIT_IOR_EXPR
),
425 FETCH_OPS (SYNC_OR_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_OR
, BIT_IOR_EXPR
),
426 FETCH_OPS (SYNC_XOR_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_XOR
, BIT_XOR_EXPR
),
427 FETCH_OPS (SYNC_XOR_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_XOR
, BIT_XOR_EXPR
),
428 FETCH_OPS (SYNC_XOR_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_XOR
, BIT_XOR_EXPR
),
429 FETCH_OPS (SYNC_XOR_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_XOR
, BIT_XOR_EXPR
),
430 FETCH_OPS (SYNC_XOR_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_XOR
, BIT_XOR_EXPR
),
431 FETCH_OPS (SYNC_NAND_AND_FETCH_1
, TSAN_ATOMIC8_FETCH_NAND
, BIT_NOT_EXPR
),
432 FETCH_OPS (SYNC_NAND_AND_FETCH_2
, TSAN_ATOMIC16_FETCH_NAND
, BIT_NOT_EXPR
),
433 FETCH_OPS (SYNC_NAND_AND_FETCH_4
, TSAN_ATOMIC32_FETCH_NAND
, BIT_NOT_EXPR
),
434 FETCH_OPS (SYNC_NAND_AND_FETCH_8
, TSAN_ATOMIC64_FETCH_NAND
, BIT_NOT_EXPR
),
435 FETCH_OPS (SYNC_NAND_AND_FETCH_16
, TSAN_ATOMIC128_FETCH_NAND
, BIT_NOT_EXPR
),
437 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK
),
438 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2
, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK
),
439 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4
, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK
),
440 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8
, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK
),
441 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16
, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK
),
443 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
444 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2
,
445 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
446 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4
,
447 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
448 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8
,
449 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
450 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16
,
451 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
453 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1
,
454 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
455 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2
,
456 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
457 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4
,
458 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
459 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8
,
460 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
461 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16
,
462 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
464 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1
, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG
),
465 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2
, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG
),
466 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4
, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG
),
467 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8
, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG
),
468 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16
,
469 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG
),
471 LOCK_RELEASE (SYNC_LOCK_RELEASE_1
, TSAN_ATOMIC8_STORE
),
472 LOCK_RELEASE (SYNC_LOCK_RELEASE_2
, TSAN_ATOMIC16_STORE
),
473 LOCK_RELEASE (SYNC_LOCK_RELEASE_4
, TSAN_ATOMIC32_STORE
),
474 LOCK_RELEASE (SYNC_LOCK_RELEASE_8
, TSAN_ATOMIC64_STORE
),
475 LOCK_RELEASE (SYNC_LOCK_RELEASE_16
, TSAN_ATOMIC128_STORE
),
477 BOOL_CLEAR (ATOMIC_CLEAR
, TSAN_ATOMIC8_STORE
),
479 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET
, TSAN_ATOMIC8_EXCHANGE
)
482 /* Instrument an atomic builtin. */
485 instrument_builtin_call (gimple_stmt_iterator
*gsi
)
487 gimple
*stmt
= gsi_stmt (*gsi
), *g
;
488 tree callee
= gimple_call_fndecl (stmt
), last_arg
, args
[6], t
, lhs
;
489 enum built_in_function fcode
= DECL_FUNCTION_CODE (callee
);
490 unsigned int i
, num
= gimple_call_num_args (stmt
), j
;
491 for (j
= 0; j
< 6 && j
< num
; j
++)
492 args
[j
] = gimple_call_arg (stmt
, j
);
493 for (i
= 0; i
< ARRAY_SIZE (tsan_atomic_table
); i
++)
494 if (fcode
!= tsan_atomic_table
[i
].fcode
)
498 tree decl
= builtin_decl_implicit (tsan_atomic_table
[i
].tsan_fcode
);
499 if (decl
== NULL_TREE
)
501 switch (tsan_atomic_table
[i
].action
)
505 last_arg
= gimple_call_arg (stmt
, num
- 1);
506 if (tree_fits_uhwi_p (last_arg
)
507 && memmodel_base (tree_to_uhwi (last_arg
)) >= MEMMODEL_LAST
)
509 gimple_call_set_fndecl (stmt
, decl
);
511 maybe_clean_eh_stmt (stmt
);
512 if (tsan_atomic_table
[i
].action
== fetch_op
)
514 args
[1] = gimple_call_arg (stmt
, 1);
520 case fetch_op_seq_cst
:
521 gcc_assert (num
<= 2);
522 for (j
= 0; j
< num
; j
++)
523 args
[j
] = gimple_call_arg (stmt
, j
);
526 args
[num
] = build_int_cst (NULL_TREE
,
527 tsan_atomic_table
[i
].action
531 update_gimple_call (gsi
, decl
, num
+ 1, args
[0], args
[1], args
[2]);
532 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
533 stmt
= gsi_stmt (*gsi
);
534 if (tsan_atomic_table
[i
].action
== fetch_op_seq_cst
)
537 lhs
= gimple_call_lhs (stmt
);
538 if (lhs
== NULL_TREE
)
540 if (!useless_type_conversion_p (TREE_TYPE (lhs
),
541 TREE_TYPE (args
[1])))
543 tree var
= make_ssa_name (TREE_TYPE (lhs
));
544 g
= gimple_build_assign (var
, NOP_EXPR
, args
[1]);
545 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
548 gimple_call_set_lhs (stmt
, make_ssa_name (TREE_TYPE (lhs
)));
549 /* BIT_NOT_EXPR stands for NAND. */
550 if (tsan_atomic_table
[i
].code
== BIT_NOT_EXPR
)
552 tree var
= make_ssa_name (TREE_TYPE (lhs
));
553 g
= gimple_build_assign (var
, BIT_AND_EXPR
,
554 gimple_call_lhs (stmt
), args
[1]);
555 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
556 g
= gimple_build_assign (lhs
, BIT_NOT_EXPR
, var
);
559 g
= gimple_build_assign (lhs
, tsan_atomic_table
[i
].code
,
560 gimple_call_lhs (stmt
), args
[1]);
562 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
566 if (!integer_nonzerop (gimple_call_arg (stmt
, 3)))
570 gcc_assert (num
== 6);
571 for (j
= 0; j
< 6; j
++)
572 args
[j
] = gimple_call_arg (stmt
, j
);
573 if (tree_fits_uhwi_p (args
[4])
574 && memmodel_base (tree_to_uhwi (args
[4])) >= MEMMODEL_LAST
)
576 if (tree_fits_uhwi_p (args
[5])
577 && memmodel_base (tree_to_uhwi (args
[5])) >= MEMMODEL_LAST
)
579 update_gimple_call (gsi
, decl
, 5, args
[0], args
[1], args
[2],
581 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
585 gcc_assert (num
== 3);
586 for (j
= 0; j
< 3; j
++)
587 args
[j
] = gimple_call_arg (stmt
, j
);
588 t
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
589 t
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t
)));
590 t
= create_tmp_var (t
);
591 mark_addressable (t
);
592 if (!useless_type_conversion_p (TREE_TYPE (t
),
593 TREE_TYPE (args
[1])))
595 g
= gimple_build_assign (make_ssa_name (TREE_TYPE (t
)),
597 gsi_insert_before (gsi
, g
, GSI_SAME_STMT
);
598 args
[1] = gimple_assign_lhs (g
);
600 g
= gimple_build_assign (t
, args
[1]);
601 gsi_insert_before (gsi
, g
, GSI_SAME_STMT
);
602 lhs
= gimple_call_lhs (stmt
);
603 update_gimple_call (gsi
, decl
, 5, args
[0],
604 build_fold_addr_expr (t
), args
[2],
605 build_int_cst (NULL_TREE
,
607 build_int_cst (NULL_TREE
,
609 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
610 if (tsan_atomic_table
[i
].action
== val_cas
&& lhs
)
613 stmt
= gsi_stmt (*gsi
);
614 g
= gimple_build_assign (make_ssa_name (TREE_TYPE (t
)), t
);
615 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
616 t
= make_ssa_name (TREE_TYPE (TREE_TYPE (decl
)), stmt
);
617 cond
= build2 (NE_EXPR
, boolean_type_node
, t
,
618 build_int_cst (TREE_TYPE (t
), 0));
619 g
= gimple_build_assign (lhs
, COND_EXPR
, cond
, args
[1],
620 gimple_assign_lhs (g
));
621 gimple_call_set_lhs (stmt
, t
);
623 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
627 gcc_assert (num
== 1);
628 t
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
629 t
= TREE_VALUE (TREE_CHAIN (t
));
630 update_gimple_call (gsi
, decl
, 3, gimple_call_arg (stmt
, 0),
631 build_int_cst (t
, 0),
632 build_int_cst (NULL_TREE
,
634 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
637 case bool_test_and_set
:
638 if (BOOL_TYPE_SIZE
!= 8)
641 for (j
= 1; j
< 5; j
++)
642 if (BOOL_TYPE_SIZE
== (8 << j
))
644 enum built_in_function tsan_fcode
645 = (enum built_in_function
)
646 (tsan_atomic_table
[i
].tsan_fcode
+ j
);
647 decl
= builtin_decl_implicit (tsan_fcode
);
650 if (decl
== NULL_TREE
)
653 last_arg
= gimple_call_arg (stmt
, num
- 1);
654 if (tree_fits_uhwi_p (last_arg
)
655 && memmodel_base (tree_to_uhwi (last_arg
)) >= MEMMODEL_LAST
)
657 t
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
658 t
= TREE_VALUE (TREE_CHAIN (t
));
659 if (tsan_atomic_table
[i
].action
== bool_clear
)
661 update_gimple_call (gsi
, decl
, 3, gimple_call_arg (stmt
, 0),
662 build_int_cst (t
, 0), last_arg
);
663 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
666 t
= build_int_cst (t
, targetm
.atomic_test_and_set_trueval
);
667 update_gimple_call (gsi
, decl
, 3, gimple_call_arg (stmt
, 0),
669 maybe_clean_or_replace_eh_stmt (stmt
, gsi_stmt (*gsi
));
670 stmt
= gsi_stmt (*gsi
);
671 lhs
= gimple_call_lhs (stmt
);
672 if (lhs
== NULL_TREE
)
674 if (targetm
.atomic_test_and_set_trueval
!= 1
675 || !useless_type_conversion_p (TREE_TYPE (lhs
),
678 tree new_lhs
= make_ssa_name (TREE_TYPE (t
));
679 gimple_call_set_lhs (stmt
, new_lhs
);
680 if (targetm
.atomic_test_and_set_trueval
!= 1)
681 g
= gimple_build_assign (lhs
, NE_EXPR
, new_lhs
,
682 build_int_cst (TREE_TYPE (t
), 0));
684 g
= gimple_build_assign (lhs
, NOP_EXPR
, new_lhs
);
685 gsi_insert_after (gsi
, g
, GSI_NEW_STMT
);
695 /* Instruments the gimple pointed to by GSI. Return
696 true if func entry/exit should be instrumented. */
699 instrument_gimple (gimple_stmt_iterator
*gsi
)
703 bool instrumented
= false;
705 stmt
= gsi_stmt (*gsi
);
706 if (is_gimple_call (stmt
)
707 && (gimple_call_fndecl (stmt
)
708 != builtin_decl_implicit (BUILT_IN_TSAN_INIT
)))
710 /* All functions with function call will have exit instrumented,
711 therefore no function calls other than __tsan_func_exit
712 shall appear in the functions. */
713 gimple_call_set_tail (as_a
<gcall
*> (stmt
), false);
714 if (gimple_call_builtin_p (stmt
, BUILT_IN_NORMAL
))
715 instrument_builtin_call (gsi
);
718 else if (is_gimple_assign (stmt
)
719 && !gimple_clobber_p (stmt
))
721 if (gimple_store_p (stmt
))
723 lhs
= gimple_assign_lhs (stmt
);
724 instrumented
= instrument_expr (*gsi
, lhs
, true);
726 if (gimple_assign_load_p (stmt
))
728 rhs
= gimple_assign_rhs1 (stmt
);
729 instrumented
= instrument_expr (*gsi
, rhs
, false);
735 /* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
738 replace_func_exit (gimple
*stmt
)
740 tree builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT
);
741 gimple
*g
= gimple_build_call (builtin_decl
, 0);
742 gimple_set_location (g
, cfun
->function_end_locus
);
743 gimple_stmt_iterator gsi
= gsi_for_stmt (stmt
);
744 gsi_replace (&gsi
, g
, true);
747 /* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
750 instrument_func_exit (void)
754 gimple_stmt_iterator gsi
;
760 /* Find all function exits. */
761 exit_bb
= EXIT_BLOCK_PTR_FOR_FN (cfun
);
762 FOR_EACH_EDGE (e
, ei
, exit_bb
->preds
)
764 gsi
= gsi_last_bb (e
->src
);
765 stmt
= gsi_stmt (gsi
);
766 gcc_assert (gimple_code (stmt
) == GIMPLE_RETURN
767 || gimple_call_builtin_p (stmt
, BUILT_IN_RETURN
));
768 loc
= gimple_location (stmt
);
769 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT
);
770 g
= gimple_build_call (builtin_decl
, 0);
771 gimple_set_location (g
, loc
);
772 gsi_insert_before (&gsi
, g
, GSI_SAME_STMT
);
776 /* Instruments all interesting memory accesses in the current function.
777 Return true if func entry/exit should be instrumented. */
780 instrument_memory_accesses (bool *cfg_changed
)
783 gimple_stmt_iterator gsi
;
784 bool fentry_exit_instrument
= false;
785 bool func_exit_seen
= false;
786 auto_vec
<gimple
*> tsan_func_exits
;
788 FOR_EACH_BB_FN (bb
, cfun
)
790 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
792 gimple
*stmt
= gsi_stmt (gsi
);
793 if (gimple_call_internal_p (stmt
, IFN_TSAN_FUNC_EXIT
))
795 if (fentry_exit_instrument
)
796 replace_func_exit (stmt
);
798 tsan_func_exits
.safe_push (stmt
);
799 func_exit_seen
= true;
802 fentry_exit_instrument
|= instrument_gimple (&gsi
);
804 if (gimple_purge_dead_eh_edges (bb
))
809 FOR_EACH_VEC_ELT (tsan_func_exits
, i
, stmt
)
810 if (fentry_exit_instrument
)
811 replace_func_exit (stmt
);
814 gsi
= gsi_for_stmt (stmt
);
815 gsi_remove (&gsi
, true);
817 if (fentry_exit_instrument
&& !func_exit_seen
)
818 instrument_func_exit ();
819 return fentry_exit_instrument
;
822 /* Instruments function entry. */
825 instrument_func_entry (void)
827 tree ret_addr
, builtin_decl
;
829 gimple_seq seq
= NULL
;
831 builtin_decl
= builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS
);
832 g
= gimple_build_call (builtin_decl
, 1, integer_zero_node
);
833 ret_addr
= make_ssa_name (ptr_type_node
);
834 gimple_call_set_lhs (g
, ret_addr
);
835 gimple_set_location (g
, cfun
->function_start_locus
);
836 gimple_seq_add_stmt_without_update (&seq
, g
);
838 builtin_decl
= builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY
);
839 g
= gimple_build_call (builtin_decl
, 1, ret_addr
);
840 gimple_set_location (g
, cfun
->function_start_locus
);
841 gimple_seq_add_stmt_without_update (&seq
, g
);
843 edge e
= single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun
));
844 gsi_insert_seq_on_edge_immediate (e
, seq
);
847 /* ThreadSanitizer instrumentation pass. */
852 initialize_sanitizer_builtins ();
853 bool cfg_changed
= false;
854 if (instrument_memory_accesses (&cfg_changed
))
855 instrument_func_entry ();
856 return cfg_changed
? TODO_cleanup_cfg
: 0;
859 /* Inserts __tsan_init () into the list of CTORs. */
862 tsan_finish_file (void)
864 tree ctor_statements
= NULL_TREE
;
866 initialize_sanitizer_builtins ();
867 tree init_decl
= builtin_decl_implicit (BUILT_IN_TSAN_INIT
);
868 append_to_statement_list (build_call_expr (init_decl
, 0),
870 cgraph_build_static_cdtor ('I', ctor_statements
,
871 MAX_RESERVED_INIT_PRIORITY
- 1);
874 /* The pass descriptor. */
878 const pass_data pass_data_tsan
=
880 GIMPLE_PASS
, /* type */
882 OPTGROUP_NONE
, /* optinfo_flags */
884 ( PROP_ssa
| PROP_cfg
), /* properties_required */
885 0, /* properties_provided */
886 0, /* properties_destroyed */
887 0, /* todo_flags_start */
888 TODO_update_ssa
, /* todo_flags_finish */
891 class pass_tsan
: public gimple_opt_pass
894 pass_tsan (gcc::context
*ctxt
)
895 : gimple_opt_pass (pass_data_tsan
, ctxt
)
898 /* opt_pass methods: */
899 opt_pass
* clone () { return new pass_tsan (m_ctxt
); }
900 virtual bool gate (function
*)
902 return sanitize_flags_p (SANITIZE_THREAD
);
905 virtual unsigned int execute (function
*) { return tsan_pass (); }
907 }; // class pass_tsan
912 make_pass_tsan (gcc::context
*ctxt
)
914 return new pass_tsan (ctxt
);
919 const pass_data pass_data_tsan_O0
=
921 GIMPLE_PASS
, /* type */
923 OPTGROUP_NONE
, /* optinfo_flags */
925 ( PROP_ssa
| PROP_cfg
), /* properties_required */
926 0, /* properties_provided */
927 0, /* properties_destroyed */
928 0, /* todo_flags_start */
929 TODO_update_ssa
, /* todo_flags_finish */
932 class pass_tsan_O0
: public gimple_opt_pass
935 pass_tsan_O0 (gcc::context
*ctxt
)
936 : gimple_opt_pass (pass_data_tsan_O0
, ctxt
)
939 /* opt_pass methods: */
940 virtual bool gate (function
*)
942 return (sanitize_flags_p (SANITIZE_THREAD
) && !optimize
);
945 virtual unsigned int execute (function
*) { return tsan_pass (); }
947 }; // class pass_tsan_O0
952 make_pass_tsan_O0 (gcc::context
*ctxt
)
954 return new pass_tsan_O0 (ctxt
);