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Correct a function pre/postcondition [PR102403].
[thirdparty/gcc.git] / gcc / tsan.c
CommitLineData
32b4b7f5 1/* GCC instrumentation plugin for ThreadSanitizer.
99dee823 2 Copyright (C) 2011-2021 Free Software Foundation, Inc.
32b4b7f5
DV		 3 Contributed by Dmitry Vyukov <dvyukov@google.com>
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING3. If not see
19<http://www.gnu.org/licenses/>. */
20
21
22#include "config.h"
23#include "system.h"
24#include "coretypes.h"
c7131fb2 25#include "backend.h"
957060b5 26#include "rtl.h"
32b4b7f5 27#include "tree.h"
e73cf9a2 28#include "memmodel.h"
c7131fb2 29#include "gimple.h"
957060b5 30#include "tree-pass.h"
c7131fb2 31#include "ssa.h"
957060b5 32#include "cgraph.h"
c7131fb2 33#include "fold-const.h"
45b0be94 34#include "gimplify.h"
5be5c238 35#include "gimple-iterator.h"
020ca950 36#include "gimplify-me.h"
442b4905 37#include "tree-cfg.h"
32b4b7f5 38#include "tree-iterator.h"
52a5515e 39#include "gimple-fold.h"
020ca950 40#include "tree-ssa-loop-ivopts.h"
f3dd574e 41#include "tree-eh.h"
0e668eaf 42#include "tsan.h"
314e6352
ML		 43#include "stringpool.h"
44#include "attribs.h"
0e668eaf 45#include "asan.h"
fe86867f 46#include "builtins.h"
5ba4a08c 47#include "target.h"
8833eab4 48#include "diagnostic-core.h"
32b4b7f5
DV		 49
50/* Number of instrumented memory accesses in the current function. */
51
52/* Builds the following decl
53 void __tsan_read/writeX (void *addr); */
54
55static tree
ab2789ec 56get_memory_access_decl (bool is_write, unsigned size, bool volatilep)
32b4b7f5
DV		 57{
58 enum built_in_function fcode;
ab2789ec 59 int pos;
32b4b7f5
DV		 60
61 if (size <= 1)
ab2789ec 62 pos = 0;
32b4b7f5 63 else if (size <= 3)
ab2789ec 64 pos = 1;
32b4b7f5 65 else if (size <= 7)
ab2789ec 66 pos = 2;
32b4b7f5 67 else if (size <= 15)
ab2789ec
ME		 68 pos = 3;
69 else
70 pos = 4;
71
72 if (param_tsan_distinguish_volatile && volatilep)
73 fcode = is_write ? BUILT_IN_TSAN_VOLATILE_WRITE1
74 : BUILT_IN_TSAN_VOLATILE_READ1;
32b4b7f5 75 else
ab2789ec
ME		 76 fcode = is_write ? BUILT_IN_TSAN_WRITE1
77 : BUILT_IN_TSAN_READ1;
78 fcode = (built_in_function)(fcode + pos);
32b4b7f5
DV		 79
80 return builtin_decl_implicit (fcode);
81}
82
83/* Check as to whether EXPR refers to a store to vptr. */
84
85static tree
355fe088 86is_vptr_store (gimple *stmt, tree expr, bool is_write)
32b4b7f5
DV		 87{
88 if (is_write == true
89 && gimple_assign_single_p (stmt)
90 && TREE_CODE (expr) == COMPONENT_REF)
91 {
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);
96 }
97 return NULL;
98}
99
32b4b7f5 100/* Instruments EXPR if needed. If any instrumentation is inserted,
8ddf5c28 101 return true. */
32b4b7f5
DV		 102
103static bool
104instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
105{
5c972fb6 106 tree base, rhs, expr_ptr, builtin_decl;
32b4b7f5
DV		 107 basic_block bb;
108 HOST_WIDE_INT size;
355fe088 109 gimple *stmt, *g;
5c972fb6 110 gimple_seq seq;
32b4b7f5 111 location_t loc;
fe86867f 112 unsigned int align;
32b4b7f5 113
32b4b7f5 114 size = int_size_in_bytes (TREE_TYPE (expr));
fe86867f 115 if (size <= 0)
32b4b7f5
DV		 116 return false;
117
f37fac2b 118 poly_int64 unused_bitsize, unused_bitpos;
32b4b7f5 119 tree offset;
ef4bddc2 120 machine_mode mode;
ee45a32d 121 int unsignedp, reversep, volatilep = 0;
f37fac2b
RS		 122 base = get_inner_reference (expr, &unused_bitsize, &unused_bitpos, &offset,
123 &mode, &unsignedp, &reversep, &volatilep);
7a36dc06
JJ		 124
125 /* No need to instrument accesses to decls that don't escape,
126 they can't escape to other threads then. */
020ca950 127 if (DECL_P (base) && !is_global_var (base))
7a36dc06
JJ		 128 {
129 struct pt_solution pt;
130 memset (&pt, 0, sizeof (pt));
131 pt.escaped = 1;
132 pt.ipa_escaped = flag_ipa_pta != 0;
7a36dc06
JJ		 133 if (!pt_solution_includes (&pt, base))
134 return false;
020ca950 135 if (!may_be_aliased (base))
7a36dc06
JJ		 136 return false;
137 }
138
8813a647 139 if (TREE_READONLY (base) || (VAR_P (base) && DECL_HARD_REGISTER (base)))
32b4b7f5
DV		 140 return false;
141
32b4b7f5
DV		 142 stmt = gsi_stmt (gsi);
143 loc = gimple_location (stmt);
144 rhs = is_vptr_store (stmt, expr, is_write);
fe86867f
BE		 145
146 if ((TREE_CODE (expr) == COMPONENT_REF
147 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
148 || TREE_CODE (expr) == BIT_FIELD_REF)
149 {
f37fac2b 150 HOST_WIDE_INT bitpos, bitsize;
fe86867f
BE		 151 base = TREE_OPERAND (expr, 0);
152 if (TREE_CODE (expr) == COMPONENT_REF)
153 {
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)))
160 return false;
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));
164 }
165 else
166 {
167 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
168 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
169 return false;
170 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
171 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
172 }
173 if (bitpos < 0 || bitsize <= 0)
174 return false;
175 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
176 / BITS_PER_UNIT;
020ca950
BE		 177 if (may_be_nonaddressable_p (base))
178 return false;
fe86867f
BE		 179 align = get_object_alignment (base);
180 if (align < BITS_PER_UNIT)
181 return false;
182 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
183 if ((align - 1) & bitpos)
184 {
185 align = (align - 1) & bitpos;
146ec50f 186 align = least_bit_hwi (align);
fe86867f 187 }
fe86867f 188 expr = build_fold_addr_expr (unshare_expr (base));
fe86867f
BE		 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);
192 }
193 else
194 {
020ca950
BE		 195 if (may_be_nonaddressable_p (expr))
196 return false;
fe86867f
BE		 197 align = get_object_alignment (expr);
198 if (align < BITS_PER_UNIT)
199 return false;
fe86867f
BE		 200 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
201 }
020ca950 202 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
1d4854da 203 if ((size & (size - 1)) != 0 || size > 16
fe86867f
BE		 204 || align < MIN (size, 8) * BITS_PER_UNIT)
205 {
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));
210 }
211 else if (rhs == NULL)
ab2789ec
ME		 212 g = gimple_build_call (get_memory_access_decl (is_write, size,
213 TREE_THIS_VOLATILE (expr)),
5c972fb6 214 1, expr_ptr);
32b4b7f5
DV		 215 else
216 {
217 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
cbf9a566 218 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
32b4b7f5
DV		 219 }
220 gimple_set_location (g, loc);
5c972fb6 221 gimple_seq_add_stmt_without_update (&seq, g);
32b4b7f5
DV		 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)
227 {
228 /* If the call can throw, it must be the last stmt in
229 a basic block, so the instrumented stmts need to be
8ddf5c28 230 inserted in successor bbs. */
32b4b7f5
DV		 231 if (is_ctrl_altering_stmt (stmt))
232 {
233 edge e;
234
235 bb = gsi_bb (gsi);
236 e = find_fallthru_edge (bb->succs);
237 if (e)
5c972fb6 238 gsi_insert_seq_on_edge_immediate (e, seq);
32b4b7f5
DV		 239 }
240 else
5c972fb6 241 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
32b4b7f5
DV		 242 }
243 else
5c972fb6 244 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
32b4b7f5
DV		 245
246 return true;
247}
248
c954bddd
JJ		 249/* Actions for sync/atomic builtin transformations. */
250enum tsan_atomic_action
251{
252 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
5ba4a08c
JJ		 253 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst,
254 bool_clear, bool_test_and_set
c954bddd
JJ		 255};
256
257/* Table how to map sync/atomic builtins to their corresponding
258 tsan equivalents. */
34c136b6 259static const struct tsan_map_atomic
c954bddd
JJ		 260{
261 enum built_in_function fcode, tsan_fcode;
262 enum tsan_atomic_action action;
263 enum tree_code code;
264} tsan_atomic_table[] =
265{
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)
5ba4a08c
JJ		 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)
c954bddd
JJ		 292
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),
338
339 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
340 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
341
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),
372
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),
378
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),
409
410 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
411
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),
442
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),
448
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),
458
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),
469
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),
476
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),
5ba4a08c
JJ		 481 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE),
482
483 BOOL_CLEAR (ATOMIC_CLEAR, TSAN_ATOMIC8_STORE),
484
485 BOOL_TEST_AND_SET (ATOMIC_TEST_AND_SET, TSAN_ATOMIC8_EXCHANGE)
c954bddd
JJ		 486};
487
488/* Instrument an atomic builtin. */
489
490static void
491instrument_builtin_call (gimple_stmt_iterator *gsi)
492{
355fe088 493 gimple *stmt = gsi_stmt (*gsi), *g;
c954bddd
JJ		 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)
501 continue;
502 else
503 {
8833eab4
ML		 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");
508
c954bddd
JJ		 509 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
510 if (decl == NULL_TREE)
511 return;
512 switch (tsan_atomic_table[i].action)
513 {
514 case check_last:
515 case fetch_op:
516 last_arg = gimple_call_arg (stmt, num - 1);
3ed67fbf
JJ		 517 if (tree_fits_uhwi_p (last_arg)
518 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
c954bddd
JJ		 519 return;
520 gimple_call_set_fndecl (stmt, decl);
521 update_stmt (stmt);
f3dd574e 522 maybe_clean_eh_stmt (stmt);
c954bddd
JJ		 523 if (tsan_atomic_table[i].action == fetch_op)
524 {
525 args[1] = gimple_call_arg (stmt, 1);
526 goto adjust_result;
527 }
528 return;
529 case add_seq_cst:
530 case add_acquire:
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);
535 for (; j < 2; j++)
536 args[j] = NULL_TREE;
537 args[num] = build_int_cst (NULL_TREE,
538 tsan_atomic_table[i].action
539 != add_acquire
540 ? MEMMODEL_SEQ_CST
541 : MEMMODEL_ACQUIRE);
542 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
f3dd574e 543 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
c954bddd
JJ		 544 stmt = gsi_stmt (*gsi);
545 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
546 {
547 adjust_result:
548 lhs = gimple_call_lhs (stmt);
549 if (lhs == NULL_TREE)
550 return;
551 if (!useless_type_conversion_p (TREE_TYPE (lhs),
552 TREE_TYPE (args[1])))
553 {
b731b390 554 tree var = make_ssa_name (TREE_TYPE (lhs));
0d0e4a03 555 g = gimple_build_assign (var, NOP_EXPR, args[1]);
c954bddd
JJ		 556 gsi_insert_after (gsi, g, GSI_NEW_STMT);
557 args[1] = var;
558 }
b731b390 559 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
c954bddd
JJ		 560 /* BIT_NOT_EXPR stands for NAND. */
561 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
562 {
b731b390 563 tree var = make_ssa_name (TREE_TYPE (lhs));
0d0e4a03
JJ		 564 g = gimple_build_assign (var, BIT_AND_EXPR,
565 gimple_call_lhs (stmt), args[1]);
c954bddd 566 gsi_insert_after (gsi, g, GSI_NEW_STMT);
0d0e4a03 567 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
c954bddd
JJ		 568 }
569 else
0d0e4a03
JJ		 570 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
571 gimple_call_lhs (stmt), args[1]);
c954bddd
JJ		 572 update_stmt (stmt);
573 gsi_insert_after (gsi, g, GSI_NEW_STMT);
574 }
575 return;
576 case weak_cas:
577 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
578 continue;
579 /* FALLTHRU */
580 case strong_cas:
581 gcc_assert (num == 6);
582 for (j = 0; j < 6; j++)
583 args[j] = gimple_call_arg (stmt, j);
3ed67fbf
JJ		 584 if (tree_fits_uhwi_p (args[4])
585 && memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
c954bddd 586 return;
3ed67fbf
JJ		 587 if (tree_fits_uhwi_p (args[5])
588 && memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
c954bddd
JJ		 589 return;
590 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
591 args[4], args[5]);
f3dd574e 592 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
c954bddd
JJ		 593 return;
594 case bool_cas:
595 case val_cas:
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)));
b731b390 601 t = create_tmp_var (t);
c954bddd
JJ		 602 mark_addressable (t);
603 if (!useless_type_conversion_p (TREE_TYPE (t),
604 TREE_TYPE (args[1])))
605 {
0d0e4a03
JJ		 606 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
607 NOP_EXPR, args[1]);
c954bddd
JJ		 608 gsi_insert_before (gsi, g, GSI_SAME_STMT);
609 args[1] = gimple_assign_lhs (g);
610 }
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,
617 MEMMODEL_SEQ_CST),
618 build_int_cst (NULL_TREE,
619 MEMMODEL_SEQ_CST));
f3dd574e 620 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
c954bddd
JJ		 621 if (tsan_atomic_table[i].action == val_cas && lhs)
622 {
623 tree cond;
624 stmt = gsi_stmt (*gsi);
b731b390 625 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
c954bddd
JJ		 626 gsi_insert_after (gsi, g, GSI_NEW_STMT);
627 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
628 cond = build2 (NE_EXPR, boolean_type_node, t,
629 build_int_cst (TREE_TYPE (t), 0));
0d0e4a03
JJ		 630 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
631 gimple_assign_lhs (g));
c954bddd
JJ		 632 gimple_call_set_lhs (stmt, t);
633 update_stmt (stmt);
634 gsi_insert_after (gsi, g, GSI_NEW_STMT);
635 }
636 return;
637 case lock_release:
638 gcc_assert (num == 1);
639 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
640 t = TREE_VALUE (TREE_CHAIN (t));
641 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
642 build_int_cst (t, 0),
643 build_int_cst (NULL_TREE,
644 MEMMODEL_RELEASE));
f3dd574e 645 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
c954bddd 646 return;
5ba4a08c
JJ		 647 case bool_clear:
648 case bool_test_and_set:
649 if (BOOL_TYPE_SIZE != 8)
650 {
651 decl = NULL_TREE;
652 for (j = 1; j < 5; j++)
653 if (BOOL_TYPE_SIZE == (8 << j))
654 {
655 enum built_in_function tsan_fcode
656 = (enum built_in_function)
657 (tsan_atomic_table[i].tsan_fcode + j);
658 decl = builtin_decl_implicit (tsan_fcode);
659 break;
660 }
661 if (decl == NULL_TREE)
662 return;
663 }
664 last_arg = gimple_call_arg (stmt, num - 1);
3ed67fbf
JJ		 665 if (tree_fits_uhwi_p (last_arg)
666 && memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
5ba4a08c
JJ		 667 return;
668 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
669 t = TREE_VALUE (TREE_CHAIN (t));
670 if (tsan_atomic_table[i].action == bool_clear)
671 {
672 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
673 build_int_cst (t, 0), last_arg);
f3dd574e 674 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
5ba4a08c
JJ		 675 return;
676 }
677 t = build_int_cst (t, targetm.atomic_test_and_set_trueval);
678 update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
679 t, last_arg);
f3dd574e 680 maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi));
5ba4a08c
JJ		 681 stmt = gsi_stmt (*gsi);
682 lhs = gimple_call_lhs (stmt);
683 if (lhs == NULL_TREE)
684 return;
685 if (targetm.atomic_test_and_set_trueval != 1
686 || !useless_type_conversion_p (TREE_TYPE (lhs),
687 TREE_TYPE (t)))
688 {
689 tree new_lhs = make_ssa_name (TREE_TYPE (t));
690 gimple_call_set_lhs (stmt, new_lhs);
691 if (targetm.atomic_test_and_set_trueval != 1)
692 g = gimple_build_assign (lhs, NE_EXPR, new_lhs,
693 build_int_cst (TREE_TYPE (t), 0));
694 else
695 g = gimple_build_assign (lhs, NOP_EXPR, new_lhs);
696 gsi_insert_after (gsi, g, GSI_NEW_STMT);
697 update_stmt (stmt);
698 }
699 return;
c954bddd
JJ		 700 default:
701 continue;
702 }
703 }
704}
705
32b4b7f5 706/* Instruments the gimple pointed to by GSI. Return
8ddf5c28 707 true if func entry/exit should be instrumented. */
32b4b7f5
DV		 708
709static bool
c954bddd 710instrument_gimple (gimple_stmt_iterator *gsi)
32b4b7f5 711{
355fe088 712 gimple *stmt;
32b4b7f5
DV		 713 tree rhs, lhs;
714 bool instrumented = false;
715
c954bddd 716 stmt = gsi_stmt (*gsi);
32b4b7f5
DV		 717 if (is_gimple_call (stmt)
718 && (gimple_call_fndecl (stmt)
719 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
c954bddd 720 {
a3f94967
JJ		 721 /* All functions with function call will have exit instrumented,
722 therefore no function calls other than __tsan_func_exit
723 shall appear in the functions. */
724 gimple_call_set_tail (as_a <gcall *> (stmt), false);
5c944c6c 725 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
c954bddd
JJ		 726 instrument_builtin_call (gsi);
727 return true;
728 }
8ddf5c28
JJ		 729 else if (is_gimple_assign (stmt)
730 && !gimple_clobber_p (stmt))
32b4b7f5
DV		 731 {
732 if (gimple_store_p (stmt))
733 {
734 lhs = gimple_assign_lhs (stmt);
c954bddd 735 instrumented = instrument_expr (*gsi, lhs, true);
32b4b7f5
DV		 736 }
737 if (gimple_assign_load_p (stmt))
738 {
739 rhs = gimple_assign_rhs1 (stmt);
c954bddd 740 instrumented = instrument_expr (*gsi, rhs, false);
32b4b7f5
DV		 741 }
742 }
743 return instrumented;
744}
745
fca4adf2
JJ		 746/* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
747
748static void
355fe088 749replace_func_exit (gimple *stmt)
fca4adf2
JJ		 750{
751 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
355fe088 752 gimple *g = gimple_build_call (builtin_decl, 0);
fca4adf2
JJ		 753 gimple_set_location (g, cfun->function_end_locus);
754 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
755 gsi_replace (&gsi, g, true);
756}
757
758/* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
759
760static void
761instrument_func_exit (void)
762{
763 location_t loc;
764 basic_block exit_bb;
765 gimple_stmt_iterator gsi;
355fe088 766 gimple *stmt, *g;
fca4adf2
JJ		 767 tree builtin_decl;
768 edge e;
769 edge_iterator ei;
770
771 /* Find all function exits. */
772 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
773 FOR_EACH_EDGE (e, ei, exit_bb->preds)
774 {
775 gsi = gsi_last_bb (e->src);
776 stmt = gsi_stmt (gsi);
777 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
778 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
779 loc = gimple_location (stmt);
780 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
781 g = gimple_build_call (builtin_decl, 0);
782 gimple_set_location (g, loc);
783 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
784 }
785}
786
32b4b7f5 787/* Instruments all interesting memory accesses in the current function.
8ddf5c28 788 Return true if func entry/exit should be instrumented. */
32b4b7f5
DV		 789
790static bool
f3dd574e 791instrument_memory_accesses (bool *cfg_changed)
32b4b7f5
DV		 792{
793 basic_block bb;
794 gimple_stmt_iterator gsi;
795 bool fentry_exit_instrument = false;
fca4adf2 796 bool func_exit_seen = false;
355fe088 797 auto_vec<gimple *> tsan_func_exits;
32b4b7f5 798
11cd3bed 799 FOR_EACH_BB_FN (bb, cfun)
f3dd574e
JJ		 800 {
801 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
802 {
803 gimple *stmt = gsi_stmt (gsi);
804 if (gimple_call_internal_p (stmt, IFN_TSAN_FUNC_EXIT))
805 {
806 if (fentry_exit_instrument)
807 replace_func_exit (stmt);
808 else
809 tsan_func_exits.safe_push (stmt);
810 func_exit_seen = true;
811 }
812 else
06712fc6
ME		 813 fentry_exit_instrument
814 |= (instrument_gimple (&gsi)
815 && param_tsan_instrument_func_entry_exit);
f3dd574e
JJ		 816 }
817 if (gimple_purge_dead_eh_edges (bb))
818 *cfg_changed = true;
819 }
fca4adf2 820 unsigned int i;
355fe088 821 gimple *stmt;
fca4adf2
JJ		 822 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
823 if (fentry_exit_instrument)
824 replace_func_exit (stmt);
825 else
826 {
827 gsi = gsi_for_stmt (stmt);
828 gsi_remove (&gsi, true);
829 }
830 if (fentry_exit_instrument && !func_exit_seen)
831 instrument_func_exit ();
32b4b7f5
DV		 832 return fentry_exit_instrument;
833}
834
835/* Instruments function entry. */
836
837static void
838instrument_func_entry (void)
839{
32b4b7f5 840 tree ret_addr, builtin_decl;
355fe088 841 gimple *g;
9ab3864f 842 gimple_seq seq = NULL;
32b4b7f5
DV		 843
844 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
845 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
b731b390 846 ret_addr = make_ssa_name (ptr_type_node);
32b4b7f5
DV		 847 gimple_call_set_lhs (g, ret_addr);
848 gimple_set_location (g, cfun->function_start_locus);
9ab3864f 849 gimple_seq_add_stmt_without_update (&seq, g);
32b4b7f5 850
9ab3864f 851 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
32b4b7f5
DV		 852 g = gimple_build_call (builtin_decl, 1, ret_addr);
853 gimple_set_location (g, cfun->function_start_locus);
9ab3864f
JJ		 854 gimple_seq_add_stmt_without_update (&seq, g);
855
856 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
857 gsi_insert_seq_on_edge_immediate (e, seq);
32b4b7f5
DV		 858}
859
32b4b7f5
DV		 860/* ThreadSanitizer instrumentation pass. */
861
862static unsigned
863tsan_pass (void)
864{
0e668eaf 865 initialize_sanitizer_builtins ();
f3dd574e
JJ		 866 bool cfg_changed = false;
867 if (instrument_memory_accesses (&cfg_changed))
fca4adf2 868 instrument_func_entry ();
f3dd574e 869 return cfg_changed ? TODO_cleanup_cfg : 0;
32b4b7f5
DV		 870}
871
32b4b7f5
DV		 872/* Inserts __tsan_init () into the list of CTORs. */
873
874void
875tsan_finish_file (void)
876{
0e668eaf 877 tree ctor_statements = NULL_TREE;
32b4b7f5 878
0e668eaf
JJ		 879 initialize_sanitizer_builtins ();
880 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
32b4b7f5
DV		 881 append_to_statement_list (build_call_expr (init_decl, 0),
882 &ctor_statements);
883 cgraph_build_static_cdtor ('I', ctor_statements,
884 MAX_RESERVED_INIT_PRIORITY - 1);
885}
886
887/* The pass descriptor. */
888
27a4cd48
DM		 889namespace {
890
891const pass_data pass_data_tsan =
32b4b7f5 892{
27a4cd48
DM		 893 GIMPLE_PASS, /* type */
894 "tsan", /* name */
895 OPTGROUP_NONE, /* optinfo_flags */
27a4cd48
DM		 896 TV_NONE, /* tv_id */
897 ( PROP_ssa | PROP_cfg ), /* properties_required */
898 0, /* properties_provided */
899 0, /* properties_destroyed */
900 0, /* todo_flags_start */
3bea341f 901 TODO_update_ssa, /* todo_flags_finish */
32b4b7f5
DV		 902};
903
27a4cd48
DM		 904class pass_tsan : public gimple_opt_pass
905{
906public:
c3284718
RS		 907 pass_tsan (gcc::context *ctxt)
908 : gimple_opt_pass (pass_data_tsan, ctxt)
27a4cd48
DM		 909 {}
910
911 /* opt_pass methods: */
65d3284b 912 opt_pass * clone () { return new pass_tsan (m_ctxt); }
1a3d085c
TS		 913 virtual bool gate (function *)
914{
45b2222a 915 return sanitize_flags_p (SANITIZE_THREAD);
1a3d085c
TS		 916}
917
be55bfe6 918 virtual unsigned int execute (function *) { return tsan_pass (); }
27a4cd48
DM		 919
920}; // class pass_tsan
921
922} // anon namespace
923
924gimple_opt_pass *
925make_pass_tsan (gcc::context *ctxt)
926{
927 return new pass_tsan (ctxt);
928}
929
27a4cd48
DM		 930namespace {
931
932const pass_data pass_data_tsan_O0 =
32b4b7f5 933{
27a4cd48
DM		 934 GIMPLE_PASS, /* type */
935 "tsan0", /* name */
936 OPTGROUP_NONE, /* optinfo_flags */
27a4cd48
DM		 937 TV_NONE, /* tv_id */
938 ( PROP_ssa | PROP_cfg ), /* properties_required */
939 0, /* properties_provided */
940 0, /* properties_destroyed */
941 0, /* todo_flags_start */
3bea341f 942 TODO_update_ssa, /* todo_flags_finish */
32b4b7f5 943};
27a4cd48
DM		 944
945class pass_tsan_O0 : public gimple_opt_pass
946{
947public:
c3284718
RS		 948 pass_tsan_O0 (gcc::context *ctxt)
949 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
27a4cd48
DM		 950 {}
951
952 /* opt_pass methods: */
1a3d085c
TS		 953 virtual bool gate (function *)
954 {
45b2222a 955 return (sanitize_flags_p (SANITIZE_THREAD) && !optimize);
1a3d085c
TS		 956 }
957
be55bfe6 958 virtual unsigned int execute (function *) { return tsan_pass (); }
27a4cd48
DM		 959
960}; // class pass_tsan_O0
961
962} // anon namespace
963
964gimple_opt_pass *
965make_pass_tsan_O0 (gcc::context *ctxt)
966{
967 return new pass_tsan_O0 (ctxt);
968}
Mirror of https://gcc.gnu.org/git/gcc.git