[RS6000] PR79144, cmpstrnsi optimization breaks glibc
[official-gcc.git] / gcc / tsan.c
blob2d4ec74cb81af191e22be33ad3c98ef4e8535184
1 /* GCC instrumentation plugin for ThreadSanitizer.
2 Copyright (C) 2011-2017 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
10 version.
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
15 for more details.
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/>. */
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "backend.h"
26 #include "rtl.h"
27 #include "tree.h"
28 #include "memmodel.h"
29 #include "gimple.h"
30 #include "tree-pass.h"
31 #include "ssa.h"
32 #include "cgraph.h"
33 #include "fold-const.h"
34 #include "gimplify.h"
35 #include "gimple-iterator.h"
36 #include "gimplify-me.h"
37 #include "tree-cfg.h"
38 #include "tree-iterator.h"
39 #include "tree-ssa-propagate.h"
40 #include "tree-ssa-loop-ivopts.h"
41 #include "tsan.h"
42 #include "asan.h"
43 #include "builtins.h"
44 #include "target.h"
46 /* Number of instrumented memory accesses in the current function. */
48 /* Builds the following decl
49 void __tsan_read/writeX (void *addr); */
51 static tree
52 get_memory_access_decl (bool is_write, unsigned size)
54 enum built_in_function fcode;
56 if (size <= 1)
57 fcode = is_write ? BUILT_IN_TSAN_WRITE1
58 : BUILT_IN_TSAN_READ1;
59 else if (size <= 3)
60 fcode = is_write ? BUILT_IN_TSAN_WRITE2
61 : BUILT_IN_TSAN_READ2;
62 else if (size <= 7)
63 fcode = is_write ? BUILT_IN_TSAN_WRITE4
64 : BUILT_IN_TSAN_READ4;
65 else if (size <= 15)
66 fcode = is_write ? BUILT_IN_TSAN_WRITE8
67 : BUILT_IN_TSAN_READ8;
68 else
69 fcode = is_write ? BUILT_IN_TSAN_WRITE16
70 : BUILT_IN_TSAN_READ16;
72 return builtin_decl_implicit (fcode);
75 /* Check as to whether EXPR refers to a store to vptr. */
77 static tree
78 is_vptr_store (gimple *stmt, tree expr, bool is_write)
80 if (is_write == true
81 && gimple_assign_single_p (stmt)
82 && TREE_CODE (expr) == COMPONENT_REF)
84 tree field = TREE_OPERAND (expr, 1);
85 if (TREE_CODE (field) == FIELD_DECL
86 && DECL_VIRTUAL_P (field))
87 return gimple_assign_rhs1 (stmt);
89 return NULL;
92 /* Instruments EXPR if needed. If any instrumentation is inserted,
93 return true. */
95 static bool
96 instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
98 tree base, rhs, expr_ptr, builtin_decl;
99 basic_block bb;
100 HOST_WIDE_INT size;
101 gimple *stmt, *g;
102 gimple_seq seq;
103 location_t loc;
104 unsigned int align;
106 size = int_size_in_bytes (TREE_TYPE (expr));
107 if (size <= 0)
108 return false;
110 HOST_WIDE_INT bitsize, bitpos;
111 tree offset;
112 machine_mode mode;
113 int unsignedp, reversep, volatilep = 0;
114 base = get_inner_reference (expr, &bitsize, &bitpos, &offset, &mode,
115 &unsignedp, &reversep, &volatilep);
117 /* No need to instrument accesses to decls that don't escape,
118 they can't escape to other threads then. */
119 if (DECL_P (base) && !is_global_var (base))
121 struct pt_solution pt;
122 memset (&pt, 0, sizeof (pt));
123 pt.escaped = 1;
124 pt.ipa_escaped = flag_ipa_pta != 0;
125 if (!pt_solution_includes (&pt, base))
126 return false;
127 if (!may_be_aliased (base))
128 return false;
131 if (TREE_READONLY (base) || (VAR_P (base) && DECL_HARD_REGISTER (base)))
132 return false;
134 stmt = gsi_stmt (gsi);
135 loc = gimple_location (stmt);
136 rhs = is_vptr_store (stmt, expr, is_write);
138 if ((TREE_CODE (expr) == COMPONENT_REF
139 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
140 || TREE_CODE (expr) == BIT_FIELD_REF)
142 base = TREE_OPERAND (expr, 0);
143 if (TREE_CODE (expr) == COMPONENT_REF)
145 expr = TREE_OPERAND (expr, 1);
146 if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
147 expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
148 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
149 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
150 || !tree_fits_uhwi_p (DECL_SIZE (expr)))
151 return false;
152 bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
153 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
154 bitsize = tree_to_uhwi (DECL_SIZE (expr));
156 else
158 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
159 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
160 return false;
161 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
162 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
164 if (bitpos < 0 || bitsize <= 0)
165 return false;
166 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
167 / BITS_PER_UNIT;
168 if (may_be_nonaddressable_p (base))
169 return false;
170 align = get_object_alignment (base);
171 if (align < BITS_PER_UNIT)
172 return false;
173 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
174 if ((align - 1) & bitpos)
176 align = (align - 1) & bitpos;
177 align = least_bit_hwi (align);
179 expr = build_fold_addr_expr (unshare_expr (base));
180 expr = build2 (MEM_REF, char_type_node, expr,
181 build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
182 expr_ptr = build_fold_addr_expr (expr);
184 else
186 if (may_be_nonaddressable_p (expr))
187 return false;
188 align = get_object_alignment (expr);
189 if (align < BITS_PER_UNIT)
190 return false;
191 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
193 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
194 if ((size & (size - 1)) != 0 || size > 16
195 || align < MIN (size, 8) * BITS_PER_UNIT)
197 builtin_decl = builtin_decl_implicit (is_write
198 ? BUILT_IN_TSAN_WRITE_RANGE
199 : BUILT_IN_TSAN_READ_RANGE);
200 g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
202 else if (rhs == NULL)
203 g = gimple_build_call (get_memory_access_decl (is_write, size),
204 1, expr_ptr);
205 else
207 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
208 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
210 gimple_set_location (g, loc);
211 gimple_seq_add_stmt_without_update (&seq, g);
212 /* Instrumentation for assignment of a function result
213 must be inserted after the call. Instrumentation for
214 reads of function arguments must be inserted before the call.
215 That's because the call can contain synchronization. */
216 if (is_gimple_call (stmt) && is_write)
218 /* If the call can throw, it must be the last stmt in
219 a basic block, so the instrumented stmts need to be
220 inserted in successor bbs. */
221 if (is_ctrl_altering_stmt (stmt))
223 edge e;
225 bb = gsi_bb (gsi);
226 e = find_fallthru_edge (bb->succs);
227 if (e)
228 gsi_insert_seq_on_edge_immediate (e, seq);
230 else
231 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
233 else
234 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
236 return true;
239 /* Actions for sync/atomic builtin transformations. */
240 enum tsan_atomic_action
242 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
243 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst,
244 bool_clear, bool_test_and_set
247 /* Table how to map sync/atomic builtins to their corresponding
248 tsan equivalents. */
249 static const struct tsan_map_atomic
251 enum built_in_function fcode, tsan_fcode;
252 enum tsan_atomic_action action;
253 enum tree_code code;
254 } tsan_atomic_table[] =
256 #define TRANSFORM(fcode, tsan_fcode, action, code) \
257 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
258 #define CHECK_LAST(fcode, tsan_fcode) \
259 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
260 #define ADD_SEQ_CST(fcode, tsan_fcode) \
261 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
262 #define ADD_ACQUIRE(fcode, tsan_fcode) \
263 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
264 #define WEAK_CAS(fcode, tsan_fcode) \
265 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
266 #define STRONG_CAS(fcode, tsan_fcode) \
267 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
268 #define BOOL_CAS(fcode, tsan_fcode) \
269 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
270 #define VAL_CAS(fcode, tsan_fcode) \
271 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
272 #define LOCK_RELEASE(fcode, tsan_fcode) \
273 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
274 #define FETCH_OP(fcode, tsan_fcode, code) \
275 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
276 #define FETCH_OPS(fcode, tsan_fcode, code) \
277 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
278 #define BOOL_CLEAR(fcode, tsan_fcode) \
279 TRANSFORM (fcode, tsan_fcode, bool_clear, ERROR_MARK)
280 #define BOOL_TEST_AND_SET(fcode, tsan_fcode) \
281 TRANSFORM (fcode, tsan_fcode, bool_test_and_set, ERROR_MARK)
283 CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
284 CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
285 CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
286 CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
287 CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
288 CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
289 CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
290 CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
291 CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
292 CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
293 CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
294 CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
295 CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
296 CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
297 CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
298 CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
299 CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
300 CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
301 CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
302 CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
303 CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
304 CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
305 CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
306 CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
307 CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
308 CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
309 CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
310 CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
311 CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
312 CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
313 CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
314 CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
315 CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
316 CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
317 CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
318 CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
319 CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
320 CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
321 CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
322 CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
323 CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
324 CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
325 CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
326 CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
327 CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
329 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
330 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
332 FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
333 FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
334 FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
335 FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
336 FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
337 FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
338 FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
339 FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
340 FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
341 FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
342 FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
343 FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
344 FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
345 FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
346 FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
347 FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
348 FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
349 FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
350 FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
351 FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
352 FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
353 FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
354 FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
355 FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
356 FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
357 FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
358 FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
359 FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
360 FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
361 FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
363 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
364 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
365 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
366 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
367 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
369 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
370 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
371 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
372 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
373 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
374 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
375 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
376 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
377 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
378 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
379 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
380 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
381 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
382 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
383 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
384 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
385 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
386 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
387 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
388 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
389 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
390 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
391 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
392 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
393 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
394 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
395 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
396 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
397 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
398 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
400 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
402 FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
403 FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
404 FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
405 FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
406 FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
407 FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
408 FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
409 FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
410 FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
411 FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
412 FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
413 FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
414 FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
415 FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
416 FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
417 FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
418 FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
419 FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
420 FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
421 FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
422 FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
423 FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
424 FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
425 FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
426 FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
427 FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
428 FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
429 FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
430 FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
431 FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
433 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
434 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
435 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
436 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
437 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
439 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
440 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
441 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
442 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
443 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
444 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
445 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
446 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
447 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
449 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
450 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
451 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
452 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
453 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
454 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
455 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
456 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
457 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
458 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
460 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
461 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
462 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
463 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
464 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
465 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
467 LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
468 LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
469 LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
470 LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
471 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE),
473 BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE),
475 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE)
478 /* Instrument an atomic builtin. */
480 static void
481 instrument_builtin_call (gimple_stmt_iterator *gsi)
483 gimple *stmt = gsi_stmt (*gsi), *g;
484 tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
485 enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
486 unsigned int i, num = gimple_call_num_args (stmt), j;
487 for (j = 0; j < 6 && j < num; j++)
488 args[j] = gimple_call_arg (stmt, j);
489 for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
490 if (fcode != tsan_atomic_table[i].fcode)
491 continue;
492 else
494 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
495 if (decl == NULL_TREE)
496 return;
497 switch (tsan_atomic_table[i].action)
499 case check_last:
500 case fetch_op:
501 last_arg = gimple_call_arg (stmt, num - 1);
502 if (!tree_fits_uhwi_p (last_arg)
503 || memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
504 return;
505 gimple_call_set_fndecl (stmt, decl);
506 update_stmt (stmt);
507 if (tsan_atomic_table[i].action == fetch_op)
509 args[1] = gimple_call_arg (stmt, 1);
510 goto adjust_result;
512 return;
513 case add_seq_cst:
514 case add_acquire:
515 case fetch_op_seq_cst:
516 gcc_assert (num <= 2);
517 for (j = 0; j < num; j++)
518 args[j] = gimple_call_arg (stmt, j);
519 for (; j < 2; j++)
520 args[j] = NULL_TREE;
521 args[num] = build_int_cst (NULL_TREE,
522 tsan_atomic_table[i].action
523 != add_acquire
524 ? MEMMODEL_SEQ_CST
525 : MEMMODEL_ACQUIRE);
526 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
527 stmt = gsi_stmt (*gsi);
528 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
530 adjust_result:
531 lhs = gimple_call_lhs (stmt);
532 if (lhs == NULL_TREE)
533 return;
534 if (!useless_type_conversion_p (TREE_TYPE (lhs),
535 TREE_TYPE (args[1])))
537 tree var = make_ssa_name (TREE_TYPE (lhs));
538 g = gimple_build_assign (var, NOP_EXPR, args[1]);
539 gsi_insert_after (gsi, g, GSI_NEW_STMT);
540 args[1] = var;
542 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
543 /* BIT_NOT_EXPR stands for NAND. */
544 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
546 tree var = make_ssa_name (TREE_TYPE (lhs));
547 g = gimple_build_assign (var, BIT_AND_EXPR,
548 gimple_call_lhs (stmt), args[1]);
549 gsi_insert_after (gsi, g, GSI_NEW_STMT);
550 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
552 else
553 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
554 gimple_call_lhs (stmt), args[1]);
555 update_stmt (stmt);
556 gsi_insert_after (gsi, g, GSI_NEW_STMT);
558 return;
559 case weak_cas:
560 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
561 continue;
562 /* FALLTHRU */
563 case strong_cas:
564 gcc_assert (num == 6);
565 for (j = 0; j < 6; j++)
566 args[j] = gimple_call_arg (stmt, j);
567 if (!tree_fits_uhwi_p (args[4])
568 || memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
569 return;
570 if (!tree_fits_uhwi_p (args[5])
571 || memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
572 return;
573 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
574 args[4], args[5]);
575 return;
576 case bool_cas:
577 case val_cas:
578 gcc_assert (num == 3);
579 for (j = 0; j < 3; j++)
580 args[j] = gimple_call_arg (stmt, j);
581 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
582 t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
583 t = create_tmp_var (t);
584 mark_addressable (t);
585 if (!useless_type_conversion_p (TREE_TYPE (t),
586 TREE_TYPE (args[1])))
588 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
589 NOP_EXPR, args[1]);
590 gsi_insert_before (gsi, g, GSI_SAME_STMT);
591 args[1] = gimple_assign_lhs (g);
593 g = gimple_build_assign (t, args[1]);
594 gsi_insert_before (gsi, g, GSI_SAME_STMT);
595 lhs = gimple_call_lhs (stmt);
596 update_gimple_call (gsi, decl, 5, args[0],
597 build_fold_addr_expr (t), args[2],
598 build_int_cst (NULL_TREE,
599 MEMMODEL_SEQ_CST),
600 build_int_cst (NULL_TREE,
601 MEMMODEL_SEQ_CST));
602 if (tsan_atomic_table[i].action == val_cas && lhs)
604 tree cond;
605 stmt = gsi_stmt (*gsi);
606 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
607 gsi_insert_after (gsi, g, GSI_NEW_STMT);
608 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
609 cond = build2 (NE_EXPR, boolean_type_node, t,
610 build_int_cst (TREE_TYPE (t), 0));
611 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
612 gimple_assign_lhs (g));
613 gimple_call_set_lhs (stmt, t);
614 update_stmt (stmt);
615 gsi_insert_after (gsi, g, GSI_NEW_STMT);
617 return;
618 case lock_release:
619 gcc_assert (num == 1);
620 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
621 t = TREE_VALUE (TREE_CHAIN (t));
622 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
623 build_int_cst (t, 0),
624 build_int_cst (NULL_TREE,
625 MEMMODEL_RELEASE));
626 return;
627 case bool_clear:
628 case bool_test_and_set:
629 if (BOOL_TYPE_SIZE != 8)
631 decl = NULL_TREE;
632 for (j = 1; j < 5; j++)
633 if (BOOL_TYPE_SIZE == (8 << j))
635 enum built_in_function tsan_fcode
636 = (enum built_in_function)
637 (tsan_atomic_table[i].tsan_fcode + j);
638 decl = builtin_decl_implicit (tsan_fcode);
639 break;
641 if (decl == NULL_TREE)
642 return;
644 last_arg = gimple_call_arg (stmt, num - 1);
645 if (!tree_fits_uhwi_p (last_arg)
646 || memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
647 return;
648 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
649 t = TREE_VALUE (TREE_CHAIN (t));
650 if (tsan_atomic_table[i].action == bool_clear)
652 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
653 build_int_cst (t, 0), last_arg);
654 return;
656 t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
657 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
658 t, last_arg);
659 stmt = gsi_stmt (*gsi);
660 lhs = gimple_call_lhs (stmt);
661 if (lhs == NULL_TREE)
662 return;
663 if (targetm.atomic_test_and_set_trueval != 1
664 || !useless_type_conversion_p (TREE_TYPE (lhs),
665 TREE_TYPE (t)))
667 tree new_lhs = make_ssa_name (TREE_TYPE (t));
668 gimple_call_set_lhs (stmt, new_lhs);
669 if (targetm.atomic_test_and_set_trueval != 1)
670 g = gimple_build_assign (lhs, NE_EXPR, new_lhs,
671 build_int_cst (TREE_TYPE (t), 0));
672 else
673 g = gimple_build_assign (lhs, NOP_EXPR, new_lhs);
674 gsi_insert_after (gsi, g, GSI_NEW_STMT);
675 update_stmt (stmt);
677 return;
678 default:
679 continue;
684 /* Instruments the gimple pointed to by GSI. Return
685 true if func entry/exit should be instrumented. */
687 static bool
688 instrument_gimple (gimple_stmt_iterator *gsi)
690 gimple *stmt;
691 tree rhs, lhs;
692 bool instrumented = false;
694 stmt = gsi_stmt (*gsi);
695 if (is_gimple_call (stmt)
696 && (gimple_call_fndecl (stmt)
697 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
699 /* All functions with function call will have exit instrumented,
700 therefore no function calls other than __tsan_func_exit
701 shall appear in the functions. */
702 gimple_call_set_tail (as_a <gcall *> (stmt), false);
703 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
704 instrument_builtin_call (gsi);
705 return true;
707 else if (is_gimple_assign (stmt)
708 && !gimple_clobber_p (stmt))
710 if (gimple_store_p (stmt))
712 lhs = gimple_assign_lhs (stmt);
713 instrumented = instrument_expr (*gsi, lhs, true);
715 if (gimple_assign_load_p (stmt))
717 rhs = gimple_assign_rhs1 (stmt);
718 instrumented = instrument_expr (*gsi, rhs, false);
721 return instrumented;
724 /* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
726 static void
727 replace_func_exit (gimple *stmt)
729 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
730 gimple *g = gimple_build_call (builtin_decl, 0);
731 gimple_set_location (g, cfun->function_end_locus);
732 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
733 gsi_replace (&gsi, g, true);
736 /* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
738 static void
739 instrument_func_exit (void)
741 location_t loc;
742 basic_block exit_bb;
743 gimple_stmt_iterator gsi;
744 gimple *stmt, *g;
745 tree builtin_decl;
746 edge e;
747 edge_iterator ei;
749 /* Find all function exits. */
750 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
751 FOR_EACH_EDGE (e, ei, exit_bb->preds)
753 gsi = gsi_last_bb (e->src);
754 stmt = gsi_stmt (gsi);
755 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
756 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
757 loc = gimple_location (stmt);
758 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
759 g = gimple_build_call (builtin_decl, 0);
760 gimple_set_location (g, loc);
761 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
765 /* Instruments all interesting memory accesses in the current function.
766 Return true if func entry/exit should be instrumented. */
768 static bool
769 instrument_memory_accesses (void)
771 basic_block bb;
772 gimple_stmt_iterator gsi;
773 bool fentry_exit_instrument = false;
774 bool func_exit_seen = false;
775 auto_vec<gimple *> tsan_func_exits;
777 FOR_EACH_BB_FN (bb, cfun)
778 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
780 gimple *stmt = gsi_stmt (gsi);
781 if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
783 if (fentry_exit_instrument)
784 replace_func_exit (stmt);
785 else
786 tsan_func_exits.safe_push (stmt);
787 func_exit_seen = true;
789 else
790 fentry_exit_instrument |= instrument_gimple (&gsi);
792 unsigned int i;
793 gimple *stmt;
794 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
795 if (fentry_exit_instrument)
796 replace_func_exit (stmt);
797 else
799 gsi = gsi_for_stmt (stmt);
800 gsi_remove (&gsi, true);
802 if (fentry_exit_instrument && !func_exit_seen)
803 instrument_func_exit ();
804 return fentry_exit_instrument;
807 /* Instruments function entry. */
809 static void
810 instrument_func_entry (void)
812 tree ret_addr, builtin_decl;
813 gimple *g;
814 gimple_seq seq = NULL;
816 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
817 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
818 ret_addr = make_ssa_name (ptr_type_node);
819 gimple_call_set_lhs (g, ret_addr);
820 gimple_set_location (g, cfun->function_start_locus);
821 gimple_seq_add_stmt_without_update (&seq, g);
823 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
824 g = gimple_build_call (builtin_decl, 1, ret_addr);
825 gimple_set_location (g, cfun->function_start_locus);
826 gimple_seq_add_stmt_without_update (&seq, g);
828 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
829 gsi_insert_seq_on_edge_immediate (e, seq);
832 /* ThreadSanitizer instrumentation pass. */
834 static unsigned
835 tsan_pass (void)
837 initialize_sanitizer_builtins ();
838 if (instrument_memory_accesses ())
839 instrument_func_entry ();
840 return 0;
843 /* Inserts __tsan_init () into the list of CTORs. */
845 void
846 tsan_finish_file (void)
848 tree ctor_statements = NULL_TREE;
850 initialize_sanitizer_builtins ();
851 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
852 append_to_statement_list (build_call_expr (init_decl, 0),
853 &ctor_statements);
854 cgraph_build_static_cdtor ('I', ctor_statements,
855 MAX_RESERVED_INIT_PRIORITY - 1);
858 /* The pass descriptor. */
860 namespace {
862 const pass_data pass_data_tsan =
864 GIMPLE_PASS, /* type */
865 "tsan", /* name */
866 OPTGROUP_NONE, /* optinfo_flags */
867 TV_NONE, /* tv_id */
868 ( PROP_ssa | PROP_cfg ), /* properties_required */
869 0, /* properties_provided */
870 0, /* properties_destroyed */
871 0, /* todo_flags_start */
872 TODO_update_ssa, /* todo_flags_finish */
875 class pass_tsan : public gimple_opt_pass
877 public:
878 pass_tsan (gcc::context *ctxt)
879 : gimple_opt_pass (pass_data_tsan, ctxt)
882 /* opt_pass methods: */
883 opt_pass * clone () { return new pass_tsan (m_ctxt); }
884 virtual bool gate (function *)
886 return ((flag_sanitize & SANITIZE_THREAD) != 0
887 && !lookup_attribute ("no_sanitize_thread",
888 DECL_ATTRIBUTES (current_function_decl)));
891 virtual unsigned int execute (function *) { return tsan_pass (); }
893 }; // class pass_tsan
895 } // anon namespace
897 gimple_opt_pass *
898 make_pass_tsan (gcc::context *ctxt)
900 return new pass_tsan (ctxt);
903 namespace {
905 const pass_data pass_data_tsan_O0 =
907 GIMPLE_PASS, /* type */
908 "tsan0", /* name */
909 OPTGROUP_NONE, /* optinfo_flags */
910 TV_NONE, /* tv_id */
911 ( PROP_ssa | PROP_cfg ), /* properties_required */
912 0, /* properties_provided */
913 0, /* properties_destroyed */
914 0, /* todo_flags_start */
915 TODO_update_ssa, /* todo_flags_finish */
918 class pass_tsan_O0 : public gimple_opt_pass
920 public:
921 pass_tsan_O0 (gcc::context *ctxt)
922 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
925 /* opt_pass methods: */
926 virtual bool gate (function *)
928 return ((flag_sanitize & SANITIZE_THREAD) != 0 && !optimize
929 && !lookup_attribute ("no_sanitize_thread",
930 DECL_ATTRIBUTES (current_function_decl)));
933 virtual unsigned int execute (function *) { return tsan_pass (); }
935 }; // class pass_tsan_O0
937 } // anon namespace
939 gimple_opt_pass *
940 make_pass_tsan_O0 (gcc::context *ctxt)
942 return new pass_tsan_O0 (ctxt);