1 /* GCC instrumentation plugin for ThreadSanitizer.
2 Copyright (C) 2011-2022 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 "gimple-fold.h"
40 #include "tree-ssa-loop-ivopts.h"
43 #include "stringpool.h"
48 #include "diagnostic-core.h"
50 /* Number of instrumented memory accesses in the current function. */
52 /* Builds the following decl
53 void __tsan_read/writeX (void *addr); */
56 get_memory_access_decl (bool is_write, unsigned size, bool volatilep)
58 enum built_in_function fcode;
72 if (param_tsan_distinguish_volatile && volatilep)
73 fcode = is_write ? BUILT_IN_TSAN_VOLATILE_WRITE1
74 : BUILT_IN_TSAN_VOLATILE_READ1;
76 fcode = is_write ? BUILT_IN_TSAN_WRITE1
77 : BUILT_IN_TSAN_READ1;
78 fcode = (built_in_function)(fcode + pos);
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;
114 size = int_size_in_bytes (TREE_TYPE (expr));
118 poly_int64 unused_bitsize, unused_bitpos;
121 int unsignedp, reversep, volatilep = 0;
122 base = get_inner_reference (expr, &unused_bitsize, &unused_bitpos, &offset,
123 &mode, &unsignedp, &reversep, &volatilep);
125 /* No need to instrument accesses to decls that don't escape,
126 they can't escape to other threads then. */
127 if (DECL_P (base) && !is_global_var (base))
129 struct pt_solution pt;
130 memset (&pt, 0, sizeof (pt));
132 pt.ipa_escaped = flag_ipa_pta != 0;
133 if (!pt_solution_includes (&pt, base))
135 if (!may_be_aliased (base))
139 if (TREE_READONLY (base) || (VAR_P (base) && DECL_HARD_REGISTER (base)))
142 stmt = gsi_stmt (gsi);
143 loc = gimple_location (stmt);
144 rhs = is_vptr_store (stmt, expr, is_write);
146 if ((TREE_CODE (expr) == COMPONENT_REF
147 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
148 || TREE_CODE (expr) == BIT_FIELD_REF)
150 HOST_WIDE_INT bitpos, bitsize;
151 base = TREE_OPERAND (expr, 0);
152 if (TREE_CODE (expr) == COMPONENT_REF)
154 expr = TREE_OPERAND (expr, 1);
155 if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
156 expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
157 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
158 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
159 || !tree_fits_uhwi_p (DECL_SIZE (expr)))
161 bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
162 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
163 bitsize = tree_to_uhwi (DECL_SIZE (expr));
167 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
168 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
170 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
171 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
173 if (bitpos < 0 || bitsize <= 0)
175 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
177 if (may_be_nonaddressable_p (base))
179 align = get_object_alignment (base);
180 if (align < BITS_PER_UNIT)
182 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
183 if ((align - 1) & bitpos)
185 align = (align - 1) & bitpos;
186 align = least_bit_hwi (align);
188 expr = build_fold_addr_expr (unshare_expr (base));
189 expr = build2 (MEM_REF, char_type_node, expr,
190 build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
191 expr_ptr = build_fold_addr_expr (expr);
195 if (may_be_nonaddressable_p (expr))
197 align = get_object_alignment (expr);
198 if (align < BITS_PER_UNIT)
200 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
202 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
203 if ((size & (size - 1)) != 0 || size > 16
204 || align < MIN (size, 8) * BITS_PER_UNIT)
206 builtin_decl = builtin_decl_implicit (is_write
207 ? BUILT_IN_TSAN_WRITE_RANGE
208 : BUILT_IN_TSAN_READ_RANGE);
209 g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
211 else if (rhs == NULL)
212 g = gimple_build_call (get_memory_access_decl (is_write, size,
213 TREE_THIS_VOLATILE (expr)),
217 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
218 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
220 gimple_set_location (g, loc);
221 gimple_seq_add_stmt_without_update (&seq, g);
222 /* Instrumentation for assignment of a function result
223 must be inserted after the call. Instrumentation for
224 reads of function arguments must be inserted before the call.
225 That's because the call can contain synchronization. */
226 if (is_gimple_call (stmt) && is_write)
228 /* If the call can throw, it must be the last stmt in
229 a basic block, so the instrumented stmts need to be
230 inserted in successor bbs. */
231 if (is_ctrl_altering_stmt (stmt))
236 e = find_fallthru_edge (bb->succs);
238 gsi_insert_seq_on_edge_immediate (e, seq);
241 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
244 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
249 /* Actions for sync/atomic builtin transformations. */
250 enum tsan_atomic_action
252 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
253 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst,
254 bool_clear, bool_test_and_set
257 /* Table how to map sync/atomic builtins to their corresponding
259 static const struct tsan_map_atomic
261 enum built_in_function fcode, tsan_fcode;
262 enum tsan_atomic_action action;
264 } tsan_atomic_table[] =
266 #define TRANSFORM(fcode, tsan_fcode, action, code) \
267 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
268 #define CHECK_LAST(fcode, tsan_fcode) \
269 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
270 #define ADD_SEQ_CST(fcode, tsan_fcode) \
271 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
272 #define ADD_ACQUIRE(fcode, tsan_fcode) \
273 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
274 #define WEAK_CAS(fcode, tsan_fcode) \
275 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
276 #define STRONG_CAS(fcode, tsan_fcode) \
277 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
278 #define BOOL_CAS(fcode, tsan_fcode) \
279 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
280 #define VAL_CAS(fcode, tsan_fcode) \
281 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
282 #define LOCK_RELEASE(fcode, tsan_fcode) \
283 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
284 #define FETCH_OP(fcode, tsan_fcode, code) \
285 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
286 #define FETCH_OPS(fcode, tsan_fcode, code) \
287 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
288 #define BOOL_CLEAR(fcode, tsan_fcode) \
289 TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK)
290 #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \
291 TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK)
293 CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
294 CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
295 CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
296 CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
297 CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
298 CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
299 CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
300 CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
301 CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
302 CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
303 CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
304 CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
305 CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
306 CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
307 CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
308 CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
309 CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
310 CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
311 CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
312 CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
313 CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
314 CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
315 CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
316 CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
317 CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
318 CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
319 CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
320 CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
321 CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
322 CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
323 CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
324 CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
325 CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
326 CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
327 CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
328 CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
329 CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
330 CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
331 CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
332 CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
333 CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
334 CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
335 CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
336 CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
337 CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
339 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
340 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
342 FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
343 FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
344 FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
345 FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
346 FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
347 FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
348 FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
349 FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
350 FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
351 FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
352 FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
353 FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
354 FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
355 FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
356 FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
357 FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
358 FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
359 FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
360 FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
361 FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
362 FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
363 FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
364 FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
365 FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
366 FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
367 FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
368 FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
369 FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
370 FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
371 FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
373 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
374 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
375 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
376 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
377 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
379 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
380 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
381 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
382 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
383 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
384 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
385 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
386 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
387 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
388 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
389 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
390 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
391 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
392 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
393 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
394 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
395 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
396 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
397 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
398 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
399 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
400 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
401 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
402 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
403 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
404 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
405 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
406 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
407 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
408 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
410 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
412 FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
413 FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
414 FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
415 FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
416 FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
417 FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
418 FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
419 FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
420 FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
421 FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
422 FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
423 FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
424 FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
425 FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
426 FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
427 FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
428 FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
429 FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
430 FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
431 FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
432 FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
433 FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
434 FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
435 FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
436 FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
437 FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
438 FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
439 FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
440 FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
441 FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
443 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
444 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
445 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
446 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
447 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
449 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
450 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
451 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
452 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
453 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
454 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
455 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
456 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
457 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
459 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
460 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
461 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
462 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
463 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
464 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
465 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
466 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
467 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
468 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
470 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
471 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
472 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
473 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
474 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
475 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
477 LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
478 LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
479 LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
480 LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
481 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE),
483 BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE),
485 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE)
488 /* Instrument an atomic builtin. */
491 instrument_builtin_call (gimple_stmt_iterator *gsi)
493 gimple *stmt = gsi_stmt (*gsi), *g;
494 tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
495 enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
496 unsigned int i, num = gimple_call_num_args (stmt), j;
497 for (j = 0; j < 6 && j < num; j++)
498 args[j] = gimple_call_arg (stmt, j);
499 for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
500 if (fcode != tsan_atomic_table[i].fcode)
504 if (fcode == BUILT_IN_ATOMIC_THREAD_FENCE)
505 warning_at (gimple_location (stmt), OPT_Wtsan,
506 "%qs is not supported with %qs", "atomic_thread_fence",
507 "-fsanitize=thread");
509 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
510 if (decl == NULL_TREE)
512 switch (tsan_atomic_table[i].action)
516 last_arg = gimple_call_arg (stmt, num - 1);
517 if (tree_fits_uhwi_p (last_arg)
518 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
520 gimple_call_set_fndecl (stmt, decl);
522 maybe_clean_eh_stmt (stmt);
523 if (tsan_atomic_table[i].action == fetch_op)
525 args[1] = gimple_call_arg (stmt, 1);
531 case fetch_op_seq_cst:
532 gcc_assert (num <= 2);
533 for (j = 0; j < num; j++)
534 args[j] = gimple_call_arg (stmt, j);
537 args[num] = build_int_cst (NULL_TREE,
538 tsan_atomic_table[i].action
542 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
543 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
544 stmt = gsi_stmt (*gsi);
545 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
548 lhs = gimple_call_lhs (stmt);
549 if (lhs == NULL_TREE)
551 if (!useless_type_conversion_p (TREE_TYPE (lhs),
552 TREE_TYPE (args[1])))
554 tree var = make_ssa_name (TREE_TYPE (lhs));
555 g = gimple_build_assign (var, NOP_EXPR, args[1]);
556 gsi_insert_after (gsi, g, GSI_NEW_STMT);
559 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
560 /* BIT_NOT_EXPR stands for NAND. */
561 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
563 tree var = make_ssa_name (TREE_TYPE (lhs));
564 g = gimple_build_assign (var, BIT_AND_EXPR,
565 gimple_call_lhs (stmt), args[1]);
566 gsi_insert_after (gsi, g, GSI_NEW_STMT);
567 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
570 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
571 gimple_call_lhs (stmt), args[1]);
573 gsi_insert_after (gsi, g, GSI_NEW_STMT);
577 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
581 gcc_assert (num == 6);
582 for (j = 0; j < 6; j++)
583 args[j] = gimple_call_arg (stmt, j);
584 if (tree_fits_uhwi_p (args[4])
585 && memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
587 if (tree_fits_uhwi_p (args[5])
588 && memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
590 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
592 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
596 gcc_assert (num == 3);
597 for (j = 0; j < 3; j++)
598 args[j] = gimple_call_arg (stmt, j);
599 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
600 t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
601 t = create_tmp_var (t);
602 mark_addressable (t);
603 if (!useless_type_conversion_p (TREE_TYPE (t),
604 TREE_TYPE (args[1])))
606 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
608 gsi_insert_before (gsi, g, GSI_SAME_STMT);
609 args[1] = gimple_assign_lhs (g);
611 g = gimple_build_assign (t, args[1]);
612 gsi_insert_before (gsi, g, GSI_SAME_STMT);
613 lhs = gimple_call_lhs (stmt);
614 update_gimple_call (gsi, decl, 5, args[0],
615 build_fold_addr_expr (t), args[2],
616 build_int_cst (NULL_TREE,
618 build_int_cst (NULL_TREE,
620 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
621 if (tsan_atomic_table[i].action == val_cas && lhs)
623 stmt = gsi_stmt (*gsi);
624 tree t2 = make_ssa_name (TREE_TYPE (t));
625 g = gimple_build_assign (t2, t);
626 gsi_insert_after (gsi, g, GSI_NEW_STMT);
627 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
628 tree cond = make_ssa_name (boolean_type_node);
629 g = gimple_build_assign (cond, NE_EXPR,
630 t, build_zero_cst (TREE_TYPE (t)));
631 gsi_insert_after (gsi, g, GSI_NEW_STMT);
632 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1], t2);
633 gimple_call_set_lhs (stmt, t);
635 gsi_insert_after (gsi, g, GSI_NEW_STMT);
639 gcc_assert (num == 1);
640 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
641 t = TREE_VALUE (TREE_CHAIN (t));
642 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
643 build_int_cst (t, 0),
644 build_int_cst (NULL_TREE,
646 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
649 case bool_test_and_set:
650 if (BOOL_TYPE_SIZE != 8)
653 for (j = 1; j < 5; j++)
654 if (BOOL_TYPE_SIZE == (8 << j))
656 enum built_in_function tsan_fcode
657 = (enum built_in_function)
658 (tsan_atomic_table[i].tsan_fcode + j);
659 decl = builtin_decl_implicit (tsan_fcode);
662 if (decl == NULL_TREE)
665 last_arg = gimple_call_arg (stmt, num - 1);
666 if (tree_fits_uhwi_p (last_arg)
667 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
669 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
670 t = TREE_VALUE (TREE_CHAIN (t));
671 if (tsan_atomic_table[i].action == bool_clear)
673 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
674 build_int_cst (t, 0), last_arg);
675 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
678 t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
679 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
681 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
682 stmt = gsi_stmt (*gsi);
683 lhs = gimple_call_lhs (stmt);
684 if (lhs == NULL_TREE)
686 if (targetm.atomic_test_and_set_trueval != 1
687 || !useless_type_conversion_p (TREE_TYPE (lhs),
690 tree new_lhs = make_ssa_name (TREE_TYPE (t));
691 gimple_call_set_lhs (stmt, new_lhs);
692 if (targetm.atomic_test_and_set_trueval != 1)
693 g = gimple_build_assign (lhs, NE_EXPR, new_lhs,
694 build_int_cst (TREE_TYPE (t), 0));
696 g = gimple_build_assign (lhs, NOP_EXPR, new_lhs);
697 gsi_insert_after (gsi, g, GSI_NEW_STMT);
707 /* Instruments the gimple pointed to by GSI. Return
708 true if func entry/exit should be instrumented. */
711 instrument_gimple (gimple_stmt_iterator *gsi)
715 bool instrumented = false;
717 stmt = gsi_stmt (*gsi);
718 if (is_gimple_call (stmt)
719 && (gimple_call_fndecl (stmt)
720 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
722 /* All functions with function call will have exit instrumented,
723 therefore no function calls other than __tsan_func_exit
724 shall appear in the functions. */
725 gimple_call_set_tail (as_a <gcall *> (stmt), false);
726 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
727 instrument_builtin_call (gsi);
730 else if (is_gimple_assign (stmt)
731 && !gimple_clobber_p (stmt))
733 if (gimple_store_p (stmt))
735 lhs = gimple_assign_lhs (stmt);
736 instrumented = instrument_expr (*gsi, lhs, true);
738 if (gimple_assign_load_p (stmt))
740 rhs = gimple_assign_rhs1 (stmt);
741 instrumented = instrument_expr (*gsi, rhs, false);
747 /* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
750 replace_func_exit (gimple *stmt)
752 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
753 gimple *g = gimple_build_call (builtin_decl, 0);
754 gimple_set_location (g, cfun->function_end_locus);
755 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
756 gsi_replace (&gsi, g, true);
759 /* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
762 instrument_func_exit (void)
766 gimple_stmt_iterator gsi;
772 /* Find all function exits. */
773 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
774 FOR_EACH_EDGE (e, ei, exit_bb->preds)
776 gsi = gsi_last_bb (e->src);
777 stmt = gsi_stmt (gsi);
778 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
779 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
780 loc = gimple_location (stmt);
781 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
782 g = gimple_build_call (builtin_decl, 0);
783 gimple_set_location (g, loc);
784 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
788 /* Instruments all interesting memory accesses in the current function.
789 Return true if func entry/exit should be instrumented. */
792 instrument_memory_accesses (bool *cfg_changed)
795 gimple_stmt_iterator gsi;
796 bool fentry_exit_instrument = false;
797 bool func_exit_seen = false;
798 auto_vec<gimple *> tsan_func_exits;
800 FOR_EACH_BB_FN (bb, cfun)
802 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
804 gimple *stmt = gsi_stmt (gsi);
805 if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
807 if (fentry_exit_instrument)
808 replace_func_exit (stmt);
810 tsan_func_exits.safe_push (stmt);
811 func_exit_seen = true;
814 fentry_exit_instrument
815 |= (instrument_gimple (&gsi)
816 && param_tsan_instrument_func_entry_exit);
818 if (gimple_purge_dead_eh_edges (bb))
823 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
824 if (fentry_exit_instrument)
825 replace_func_exit (stmt);
828 gsi = gsi_for_stmt (stmt);
829 gsi_remove (&gsi, true);
831 if (fentry_exit_instrument && !func_exit_seen)
832 instrument_func_exit ();
833 return fentry_exit_instrument;
836 /* Instruments function entry. */
839 instrument_func_entry (void)
841 tree ret_addr, builtin_decl;
843 gimple_seq seq = NULL;
845 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
846 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
847 ret_addr = make_ssa_name (ptr_type_node);
848 gimple_call_set_lhs (g, ret_addr);
849 gimple_set_location (g, cfun->function_start_locus);
850 gimple_seq_add_stmt_without_update (&seq, g);
852 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
853 g = gimple_build_call (builtin_decl, 1, ret_addr);
854 gimple_set_location (g, cfun->function_start_locus);
855 gimple_seq_add_stmt_without_update (&seq, g);
857 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
858 gsi_insert_seq_on_edge_immediate (e, seq);
861 /* ThreadSanitizer instrumentation pass. */
866 initialize_sanitizer_builtins ();
867 bool cfg_changed = false;
868 if (instrument_memory_accesses (&cfg_changed))
869 instrument_func_entry ();
870 return cfg_changed ? TODO_cleanup_cfg : 0;
873 /* Inserts __tsan_init () into the list of CTORs. */
876 tsan_finish_file (void)
878 tree ctor_statements = NULL_TREE;
880 initialize_sanitizer_builtins ();
881 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
882 append_to_statement_list (build_call_expr (init_decl, 0),
884 cgraph_build_static_cdtor ('I', ctor_statements,
885 MAX_RESERVED_INIT_PRIORITY - 1);
888 /* The pass descriptor. */
892 const pass_data pass_data_tsan =
894 GIMPLE_PASS, /* type */
896 OPTGROUP_NONE, /* optinfo_flags */
898 ( PROP_ssa | PROP_cfg ), /* properties_required */
899 0, /* properties_provided */
900 0, /* properties_destroyed */
901 0, /* todo_flags_start */
902 TODO_update_ssa, /* todo_flags_finish */
905 class pass_tsan : public gimple_opt_pass
908 pass_tsan (gcc::context *ctxt)
909 : gimple_opt_pass (pass_data_tsan, ctxt)
912 /* opt_pass methods: */
913 opt_pass * clone () final override { return new pass_tsan (m_ctxt); }
914 bool gate (function *) final override
916 return sanitize_flags_p (SANITIZE_THREAD);
919 unsigned int execute (function *) final override { return tsan_pass (); }
921 }; // class pass_tsan
926 make_pass_tsan (gcc::context *ctxt)
928 return new pass_tsan (ctxt);
933 const pass_data pass_data_tsan_O0 =
935 GIMPLE_PASS, /* type */
937 OPTGROUP_NONE, /* optinfo_flags */
939 ( PROP_ssa | PROP_cfg ), /* properties_required */
940 0, /* properties_provided */
941 0, /* properties_destroyed */
942 0, /* todo_flags_start */
943 TODO_update_ssa, /* todo_flags_finish */
946 class pass_tsan_O0 : public gimple_opt_pass
949 pass_tsan_O0 (gcc::context *ctxt)
950 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
953 /* opt_pass methods: */
954 bool gate (function *) final override
956 return (sanitize_flags_p (SANITIZE_THREAD) && !optimize);
959 unsigned int execute (function *) final override { return tsan_pass (); }
961 }; // class pass_tsan_O0
966 make_pass_tsan_O0 (gcc::context *ctxt)
968 return new pass_tsan_O0 (ctxt);