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b077695d 1/* GCC instrumentation plugin for ThreadSanitizer.
d353bf18 2 Copyright (C) 2011-2015 Free Software Foundation, Inc.
b077695d 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"
b20a8bb4 25#include "alias.h"
26#include "symtab.h"
27#include "options.h"
b077695d 28#include "tree.h"
b20a8bb4 29#include "fold-const.h"
b077695d 30#include "tm.h"
94ea8568 31#include "hard-reg-set.h"
94ea8568 32#include "function.h"
d53441c8 33#include "rtl.h"
34#include "flags.h"
d53441c8 35#include "insn-config.h"
36#include "expmed.h"
37#include "dojump.h"
38#include "explow.h"
39#include "calls.h"
40#include "emit-rtl.h"
41#include "varasm.h"
42#include "stmt.h"
43#include "expr.h"
44#include "intl.h"
45#include "predict.h"
94ea8568 46#include "dominance.h"
47#include "cfg.h"
b077695d 48#include "basic-block.h"
bc61cadb 49#include "tree-ssa-alias.h"
50#include "internal-fn.h"
51#include "gimple-expr.h"
e795d6e1 52#include "gimple.h"
a8783bee 53#include "gimplify.h"
dcf1a1ec 54#include "gimple-iterator.h"
5a17c7cc 55#include "gimplify-me.h"
073c1fd5 56#include "gimple-ssa.h"
57#include "cgraph.h"
58#include "tree-cfg.h"
9ed99284 59#include "stringpool.h"
073c1fd5 60#include "tree-ssanames.h"
b077695d 61#include "tree-pass.h"
62#include "tree-iterator.h"
63#include "langhooks.h"
64#include "output.h"
b077695d 65#include "target.h"
b077695d 66#include "diagnostic.h"
83392e87 67#include "tree-ssa-propagate.h"
5a17c7cc 68#include "tree-ssa-loop-ivopts.h"
b45e34ed 69#include "tsan.h"
70#include "asan.h"
831b9bed 71#include "builtins.h"
b077695d 72
73/* Number of instrumented memory accesses in the current function. */
74
75/* Builds the following decl
76 void __tsan_read/writeX (void *addr); */
77
78static tree
79get_memory_access_decl (bool is_write, unsigned size)
80{
81 enum built_in_function fcode;
82
83 if (size <= 1)
b45e34ed 84 fcode = is_write ? BUILT_IN_TSAN_WRITE1
85 : BUILT_IN_TSAN_READ1;
b077695d 86 else if (size <= 3)
b45e34ed 87 fcode = is_write ? BUILT_IN_TSAN_WRITE2
88 : BUILT_IN_TSAN_READ2;
b077695d 89 else if (size <= 7)
b45e34ed 90 fcode = is_write ? BUILT_IN_TSAN_WRITE4
91 : BUILT_IN_TSAN_READ4;
b077695d 92 else if (size <= 15)
b45e34ed 93 fcode = is_write ? BUILT_IN_TSAN_WRITE8
94 : BUILT_IN_TSAN_READ8;
b077695d 95 else
b45e34ed 96 fcode = is_write ? BUILT_IN_TSAN_WRITE16
97 : BUILT_IN_TSAN_READ16;
b077695d 98
99 return builtin_decl_implicit (fcode);
100}
101
102/* Check as to whether EXPR refers to a store to vptr. */
103
104static tree
105is_vptr_store (gimple stmt, tree expr, bool is_write)
106{
107 if (is_write == true
108 && gimple_assign_single_p (stmt)
109 && TREE_CODE (expr) == COMPONENT_REF)
110 {
111 tree field = TREE_OPERAND (expr, 1);
112 if (TREE_CODE (field) == FIELD_DECL
113 && DECL_VIRTUAL_P (field))
114 return gimple_assign_rhs1 (stmt);
115 }
116 return NULL;
117}
118
b077695d 119/* Instruments EXPR if needed. If any instrumentation is inserted,
a4641938 120 return true. */
b077695d 121
122static bool
123instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
124{
c2fa3404 125 tree base, rhs, expr_ptr, builtin_decl;
b077695d 126 basic_block bb;
127 HOST_WIDE_INT size;
128 gimple stmt, g;
c2fa3404 129 gimple_seq seq;
b077695d 130 location_t loc;
831b9bed 131 unsigned int align;
b077695d 132
b077695d 133 size = int_size_in_bytes (TREE_TYPE (expr));
831b9bed 134 if (size <= 0)
b077695d 135 return false;
136
b077695d 137 HOST_WIDE_INT bitsize, bitpos;
138 tree offset;
3754d046 139 machine_mode mode;
b077695d 140 int volatilep = 0, unsignedp = 0;
5a5c6968 141 base = get_inner_reference (expr, &bitsize, &bitpos, &offset,
dc317fc8 142 &mode, &unsignedp, &volatilep, false);
5a5c6968 143
144 /* No need to instrument accesses to decls that don't escape,
145 they can't escape to other threads then. */
5a17c7cc 146 if (DECL_P (base) && !is_global_var (base))
5a5c6968 147 {
148 struct pt_solution pt;
149 memset (&pt, 0, sizeof (pt));
150 pt.escaped = 1;
151 pt.ipa_escaped = flag_ipa_pta != 0;
5a5c6968 152 if (!pt_solution_includes (&pt, base))
153 return false;
5a17c7cc 154 if (!may_be_aliased (base))
5a5c6968 155 return false;
156 }
157
060d11f4 158 if (TREE_READONLY (base)
159 || (TREE_CODE (base) == VAR_DECL
160 && DECL_HARD_REGISTER (base)))
b077695d 161 return false;
162
b077695d 163 stmt = gsi_stmt (gsi);
164 loc = gimple_location (stmt);
165 rhs = is_vptr_store (stmt, expr, is_write);
831b9bed 166
167 if ((TREE_CODE (expr) == COMPONENT_REF
168 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
169 || TREE_CODE (expr) == BIT_FIELD_REF)
170 {
171 base = TREE_OPERAND (expr, 0);
172 if (TREE_CODE (expr) == COMPONENT_REF)
173 {
174 expr = TREE_OPERAND (expr, 1);
175 if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
176 expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
177 if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
178 || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
179 || !tree_fits_uhwi_p (DECL_SIZE (expr)))
180 return false;
181 bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
182 + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
183 bitsize = tree_to_uhwi (DECL_SIZE (expr));
184 }
185 else
186 {
187 if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
188 || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
189 return false;
190 bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
191 bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
192 }
193 if (bitpos < 0 || bitsize <= 0)
194 return false;
195 size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
196 / BITS_PER_UNIT;
5a17c7cc 197 if (may_be_nonaddressable_p (base))
198 return false;
831b9bed 199 align = get_object_alignment (base);
200 if (align < BITS_PER_UNIT)
201 return false;
202 bitpos = bitpos & ~(BITS_PER_UNIT - 1);
203 if ((align - 1) & bitpos)
204 {
205 align = (align - 1) & bitpos;
206 align = align & -align;
207 }
831b9bed 208 expr = build_fold_addr_expr (unshare_expr (base));
831b9bed 209 expr = build2 (MEM_REF, char_type_node, expr,
210 build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
211 expr_ptr = build_fold_addr_expr (expr);
212 }
213 else
214 {
5a17c7cc 215 if (may_be_nonaddressable_p (expr))
216 return false;
831b9bed 217 align = get_object_alignment (expr);
218 if (align < BITS_PER_UNIT)
219 return false;
831b9bed 220 expr_ptr = build_fold_addr_expr (unshare_expr (expr));
221 }
5a17c7cc 222 expr_ptr = force_gimple_operand (expr_ptr, &seq, true, NULL_TREE);
71f0663f 223 if ((size & (size - 1)) != 0 || size > 16
831b9bed 224 || align < MIN (size, 8) * BITS_PER_UNIT)
225 {
226 builtin_decl = builtin_decl_implicit (is_write
227 ? BUILT_IN_TSAN_WRITE_RANGE
228 : BUILT_IN_TSAN_READ_RANGE);
229 g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
230 }
231 else if (rhs == NULL)
c2fa3404 232 g = gimple_build_call (get_memory_access_decl (is_write, size),
233 1, expr_ptr);
b077695d 234 else
235 {
236 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
24fe68b6 237 g = gimple_build_call (builtin_decl, 2, expr_ptr, unshare_expr (rhs));
b077695d 238 }
239 gimple_set_location (g, loc);
c2fa3404 240 gimple_seq_add_stmt_without_update (&seq, g);
b077695d 241 /* Instrumentation for assignment of a function result
242 must be inserted after the call. Instrumentation for
243 reads of function arguments must be inserted before the call.
244 That's because the call can contain synchronization. */
245 if (is_gimple_call (stmt) && is_write)
246 {
247 /* If the call can throw, it must be the last stmt in
248 a basic block, so the instrumented stmts need to be
a4641938 249 inserted in successor bbs. */
b077695d 250 if (is_ctrl_altering_stmt (stmt))
251 {
252 edge e;
253
254 bb = gsi_bb (gsi);
255 e = find_fallthru_edge (bb->succs);
256 if (e)
c2fa3404 257 gsi_insert_seq_on_edge_immediate (e, seq);
b077695d 258 }
259 else
c2fa3404 260 gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
b077695d 261 }
262 else
c2fa3404 263 gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
b077695d 264
265 return true;
266}
267
83392e87 268/* Actions for sync/atomic builtin transformations. */
269enum tsan_atomic_action
270{
271 check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
272 bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst
273};
274
275/* Table how to map sync/atomic builtins to their corresponding
276 tsan equivalents. */
9d34f097 277static const struct tsan_map_atomic
83392e87 278{
279 enum built_in_function fcode, tsan_fcode;
280 enum tsan_atomic_action action;
281 enum tree_code code;
282} tsan_atomic_table[] =
283{
284#define TRANSFORM(fcode, tsan_fcode, action, code) \
285 { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
286#define CHECK_LAST(fcode, tsan_fcode) \
287 TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
288#define ADD_SEQ_CST(fcode, tsan_fcode) \
289 TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
290#define ADD_ACQUIRE(fcode, tsan_fcode) \
291 TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
292#define WEAK_CAS(fcode, tsan_fcode) \
293 TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
294#define STRONG_CAS(fcode, tsan_fcode) \
295 TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
296#define BOOL_CAS(fcode, tsan_fcode) \
297 TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
298#define VAL_CAS(fcode, tsan_fcode) \
299 TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
300#define LOCK_RELEASE(fcode, tsan_fcode) \
301 TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
302#define FETCH_OP(fcode, tsan_fcode, code) \
303 TRANSFORM (fcode, tsan_fcode, fetch_op, code)
304#define FETCH_OPS(fcode, tsan_fcode, code) \
305 TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
306
307 CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
308 CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
309 CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
310 CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
311 CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
312 CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
313 CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
314 CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
315 CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
316 CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
317 CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
318 CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
319 CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
320 CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
321 CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
322 CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
323 CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
324 CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
325 CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
326 CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
327 CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
328 CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
329 CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
330 CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
331 CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
332 CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
333 CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
334 CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
335 CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
336 CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
337 CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
338 CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
339 CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
340 CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
341 CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
342 CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
343 CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
344 CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
345 CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
346 CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
347 CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
348 CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
349 CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
350 CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
351 CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
352
353 CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
354 CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
355
356 FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
357 FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
358 FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
359 FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
360 FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
361 FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
362 FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
363 FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
364 FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
365 FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
366 FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
367 FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
368 FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
369 FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
370 FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
371 FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
372 FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
373 FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
374 FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
375 FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
376 FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
377 FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
378 FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
379 FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
380 FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
381 FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
382 FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
383 FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
384 FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
385 FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
386
387 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
388 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
389 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
390 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
391 ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
392
393 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
394 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
395 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
396 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
397 ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
398 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
399 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
400 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
401 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
402 ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
403 ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
404 ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
405 ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
406 ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
407 ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
408 ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
409 ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
410 ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
411 ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
412 ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
413 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
414 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
415 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
416 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
417 ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
418 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
419 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
420 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
421 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
422 ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
423
424 ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
425
426 FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
427 FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
428 FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
429 FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
430 FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
431 FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
432 FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
433 FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
434 FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
435 FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
436 FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
437 FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
438 FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
439 FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
440 FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
441 FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
442 FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
443 FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
444 FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
445 FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
446 FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
447 FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
448 FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
449 FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
450 FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
451 FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
452 FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
453 FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
454 FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
455 FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
456
457 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
458 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
459 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
460 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
461 WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
462
463 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
464 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
465 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
466 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
467 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
468 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
469 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
470 STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
471 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
472
473 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
474 TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
475 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
476 TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
477 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
478 TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
479 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
480 TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
481 BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
482 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
483
484 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
485 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
486 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
487 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
488 VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
489 TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
490
491 LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
492 LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
493 LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
494 LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
495 LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE)
496};
497
498/* Instrument an atomic builtin. */
499
500static void
501instrument_builtin_call (gimple_stmt_iterator *gsi)
502{
503 gimple stmt = gsi_stmt (*gsi), g;
504 tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
505 enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
506 unsigned int i, num = gimple_call_num_args (stmt), j;
507 for (j = 0; j < 6 && j < num; j++)
508 args[j] = gimple_call_arg (stmt, j);
509 for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
510 if (fcode != tsan_atomic_table[i].fcode)
511 continue;
512 else
513 {
514 tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
515 if (decl == NULL_TREE)
516 return;
517 switch (tsan_atomic_table[i].action)
518 {
519 case check_last:
520 case fetch_op:
521 last_arg = gimple_call_arg (stmt, num - 1);
cd4547bf 522 if (!tree_fits_uhwi_p (last_arg)
a372f7ca 523 || memmodel_base (tree_to_uhwi (last_arg)) >= MEMMODEL_LAST)
83392e87 524 return;
525 gimple_call_set_fndecl (stmt, decl);
526 update_stmt (stmt);
527 if (tsan_atomic_table[i].action == fetch_op)
528 {
529 args[1] = gimple_call_arg (stmt, 1);
530 goto adjust_result;
531 }
532 return;
533 case add_seq_cst:
534 case add_acquire:
535 case fetch_op_seq_cst:
536 gcc_assert (num <= 2);
537 for (j = 0; j < num; j++)
538 args[j] = gimple_call_arg (stmt, j);
539 for (; j < 2; j++)
540 args[j] = NULL_TREE;
541 args[num] = build_int_cst (NULL_TREE,
542 tsan_atomic_table[i].action
543 != add_acquire
544 ? MEMMODEL_SEQ_CST
545 : MEMMODEL_ACQUIRE);
546 update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
547 stmt = gsi_stmt (*gsi);
548 if (tsan_atomic_table[i].action == fetch_op_seq_cst)
549 {
550 adjust_result:
551 lhs = gimple_call_lhs (stmt);
552 if (lhs == NULL_TREE)
553 return;
554 if (!useless_type_conversion_p (TREE_TYPE (lhs),
555 TREE_TYPE (args[1])))
556 {
f9e245b2 557 tree var = make_ssa_name (TREE_TYPE (lhs));
e9cf809e 558 g = gimple_build_assign (var, NOP_EXPR, args[1]);
83392e87 559 gsi_insert_after (gsi, g, GSI_NEW_STMT);
560 args[1] = var;
561 }
f9e245b2 562 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
83392e87 563 /* BIT_NOT_EXPR stands for NAND. */
564 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
565 {
f9e245b2 566 tree var = make_ssa_name (TREE_TYPE (lhs));
e9cf809e 567 g = gimple_build_assign (var, BIT_AND_EXPR,
568 gimple_call_lhs (stmt), args[1]);
83392e87 569 gsi_insert_after (gsi, g, GSI_NEW_STMT);
e9cf809e 570 g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
83392e87 571 }
572 else
e9cf809e 573 g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
574 gimple_call_lhs (stmt), args[1]);
83392e87 575 update_stmt (stmt);
576 gsi_insert_after (gsi, g, GSI_NEW_STMT);
577 }
578 return;
579 case weak_cas:
580 if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
581 continue;
582 /* FALLTHRU */
583 case strong_cas:
584 gcc_assert (num == 6);
585 for (j = 0; j < 6; j++)
586 args[j] = gimple_call_arg (stmt, j);
cd4547bf 587 if (!tree_fits_uhwi_p (args[4])
a372f7ca 588 || memmodel_base (tree_to_uhwi (args[4])) >= MEMMODEL_LAST)
83392e87 589 return;
cd4547bf 590 if (!tree_fits_uhwi_p (args[5])
a372f7ca 591 || memmodel_base (tree_to_uhwi (args[5])) >= MEMMODEL_LAST)
83392e87 592 return;
593 update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
594 args[4], args[5]);
595 return;
596 case bool_cas:
597 case val_cas:
598 gcc_assert (num == 3);
599 for (j = 0; j < 3; j++)
600 args[j] = gimple_call_arg (stmt, j);
601 t = TYPE_ARG_TYPES (TREE_TYPE (decl));
602 t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
f9e245b2 603 t = create_tmp_var (t);
83392e87 604 mark_addressable (t);
605 if (!useless_type_conversion_p (TREE_TYPE (t),
606 TREE_TYPE (args[1])))
607 {
e9cf809e 608 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
609 NOP_EXPR, args[1]);
83392e87 610 gsi_insert_before (gsi, g, GSI_SAME_STMT);
611 args[1] = gimple_assign_lhs (g);
612 }
613 g = gimple_build_assign (t, args[1]);
614 gsi_insert_before (gsi, g, GSI_SAME_STMT);
615 lhs = gimple_call_lhs (stmt);
616 update_gimple_call (gsi, decl, 5, args[0],
617 build_fold_addr_expr (t), args[2],
618 build_int_cst (NULL_TREE,
619 MEMMODEL_SEQ_CST),
620 build_int_cst (NULL_TREE,
621 MEMMODEL_SEQ_CST));
622 if (tsan_atomic_table[i].action == val_cas && lhs)
623 {
624 tree cond;
625 stmt = gsi_stmt (*gsi);
f9e245b2 626 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
83392e87 627 gsi_insert_after (gsi, g, GSI_NEW_STMT);
628 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
629 cond = build2 (NE_EXPR, boolean_type_node, t,
630 build_int_cst (TREE_TYPE (t), 0));
e9cf809e 631 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
632 gimple_assign_lhs (g));
83392e87 633 gimple_call_set_lhs (stmt, t);
634 update_stmt (stmt);
635 gsi_insert_after (gsi, g, GSI_NEW_STMT);
636 }
637 return;
638 case lock_release:
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,
645 MEMMODEL_RELEASE));
646 return;
647 default:
648 continue;
649 }
650 }
651}
652
b077695d 653/* Instruments the gimple pointed to by GSI. Return
a4641938 654 true if func entry/exit should be instrumented. */
b077695d 655
656static bool
83392e87 657instrument_gimple (gimple_stmt_iterator *gsi)
b077695d 658{
659 gimple stmt;
660 tree rhs, lhs;
661 bool instrumented = false;
662
83392e87 663 stmt = gsi_stmt (*gsi);
b077695d 664 if (is_gimple_call (stmt)
665 && (gimple_call_fndecl (stmt)
666 != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
83392e87 667 {
a691030f 668 /* All functions with function call will have exit instrumented,
669 therefore no function calls other than __tsan_func_exit
670 shall appear in the functions. */
671 gimple_call_set_tail (as_a <gcall *> (stmt), false);
8ded4352 672 if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
83392e87 673 instrument_builtin_call (gsi);
674 return true;
675 }
a4641938 676 else if (is_gimple_assign (stmt)
677 && !gimple_clobber_p (stmt))
b077695d 678 {
679 if (gimple_store_p (stmt))
680 {
681 lhs = gimple_assign_lhs (stmt);
83392e87 682 instrumented = instrument_expr (*gsi, lhs, true);
b077695d 683 }
684 if (gimple_assign_load_p (stmt))
685 {
686 rhs = gimple_assign_rhs1 (stmt);
83392e87 687 instrumented = instrument_expr (*gsi, rhs, false);
b077695d 688 }
689 }
690 return instrumented;
691}
692
ed53cebe 693/* Replace TSAN_FUNC_EXIT internal call with function exit tsan builtin. */
694
695static void
696replace_func_exit (gimple stmt)
697{
698 tree builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
699 gimple g = gimple_build_call (builtin_decl, 0);
700 gimple_set_location (g, cfun->function_end_locus);
701 gimple_stmt_iterator gsi = gsi_for_stmt (stmt);
702 gsi_replace (&gsi, g, true);
703}
704
705/* Instrument function exit. Used when TSAN_FUNC_EXIT does not exist. */
706
707static void
708instrument_func_exit (void)
709{
710 location_t loc;
711 basic_block exit_bb;
712 gimple_stmt_iterator gsi;
713 gimple stmt, g;
714 tree builtin_decl;
715 edge e;
716 edge_iterator ei;
717
718 /* Find all function exits. */
719 exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
720 FOR_EACH_EDGE (e, ei, exit_bb->preds)
721 {
722 gsi = gsi_last_bb (e->src);
723 stmt = gsi_stmt (gsi);
724 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
725 || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
726 loc = gimple_location (stmt);
727 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
728 g = gimple_build_call (builtin_decl, 0);
729 gimple_set_location (g, loc);
730 gsi_insert_before (&gsi, g, GSI_SAME_STMT);
731 }
732}
733
b077695d 734/* Instruments all interesting memory accesses in the current function.
a4641938 735 Return true if func entry/exit should be instrumented. */
b077695d 736
737static bool
738instrument_memory_accesses (void)
739{
740 basic_block bb;
741 gimple_stmt_iterator gsi;
742 bool fentry_exit_instrument = false;
ed53cebe 743 bool func_exit_seen = false;
744 auto_vec<gimple> tsan_func_exits;
b077695d 745
fc00614f 746 FOR_EACH_BB_FN (bb, cfun)
b077695d 747 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
ed53cebe 748 {
749 gimple stmt = gsi_stmt (gsi);
750 if (is_gimple_call (stmt)
751 && gimple_call_internal_p (stmt)
752 && gimple_call_internal_fn (stmt) == IFN_TSAN_FUNC_EXIT)
753 {
754 if (fentry_exit_instrument)
755 replace_func_exit (stmt);
756 else
757 tsan_func_exits.safe_push (stmt);
758 func_exit_seen = true;
759 }
760 else
761 fentry_exit_instrument |= instrument_gimple (&gsi);
762 }
763 unsigned int i;
764 gimple stmt;
765 FOR_EACH_VEC_ELT (tsan_func_exits, i, stmt)
766 if (fentry_exit_instrument)
767 replace_func_exit (stmt);
768 else
769 {
770 gsi = gsi_for_stmt (stmt);
771 gsi_remove (&gsi, true);
772 }
773 if (fentry_exit_instrument && !func_exit_seen)
774 instrument_func_exit ();
b077695d 775 return fentry_exit_instrument;
776}
777
778/* Instruments function entry. */
779
780static void
781instrument_func_entry (void)
782{
b077695d 783 tree ret_addr, builtin_decl;
784 gimple g;
f2940d10 785 gimple_seq seq = NULL;
b077695d 786
787 builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
788 g = gimple_build_call (builtin_decl, 1, integer_zero_node);
f9e245b2 789 ret_addr = make_ssa_name (ptr_type_node);
b077695d 790 gimple_call_set_lhs (g, ret_addr);
791 gimple_set_location (g, cfun->function_start_locus);
f2940d10 792 gimple_seq_add_stmt_without_update (&seq, g);
b077695d 793
f2940d10 794 builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
b077695d 795 g = gimple_build_call (builtin_decl, 1, ret_addr);
796 gimple_set_location (g, cfun->function_start_locus);
f2940d10 797 gimple_seq_add_stmt_without_update (&seq, g);
798
799 edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
800 gsi_insert_seq_on_edge_immediate (e, seq);
b077695d 801}
802
b077695d 803/* ThreadSanitizer instrumentation pass. */
804
805static unsigned
806tsan_pass (void)
807{
b45e34ed 808 initialize_sanitizer_builtins ();
b077695d 809 if (instrument_memory_accesses ())
ed53cebe 810 instrument_func_entry ();
b077695d 811 return 0;
812}
813
b077695d 814/* Inserts __tsan_init () into the list of CTORs. */
815
816void
817tsan_finish_file (void)
818{
b45e34ed 819 tree ctor_statements = NULL_TREE;
b077695d 820
b45e34ed 821 initialize_sanitizer_builtins ();
822 tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
b077695d 823 append_to_statement_list (build_call_expr (init_decl, 0),
824 &ctor_statements);
825 cgraph_build_static_cdtor ('I', ctor_statements,
826 MAX_RESERVED_INIT_PRIORITY - 1);
827}
828
829/* The pass descriptor. */
830
cbe8bda8 831namespace {
832
833const pass_data pass_data_tsan =
b077695d 834{
cbe8bda8 835 GIMPLE_PASS, /* type */
836 "tsan", /* name */
837 OPTGROUP_NONE, /* optinfo_flags */
cbe8bda8 838 TV_NONE, /* tv_id */
839 ( PROP_ssa | PROP_cfg ), /* properties_required */
840 0, /* properties_provided */
841 0, /* properties_destroyed */
842 0, /* todo_flags_start */
8b88439e 843 TODO_update_ssa, /* todo_flags_finish */
b077695d 844};
845
cbe8bda8 846class pass_tsan : public gimple_opt_pass
847{
848public:
9af5ce0c 849 pass_tsan (gcc::context *ctxt)
850 : gimple_opt_pass (pass_data_tsan, ctxt)
cbe8bda8 851 {}
852
853 /* opt_pass methods: */
ae84f584 854 opt_pass * clone () { return new pass_tsan (m_ctxt); }
31315c24 855 virtual bool gate (function *)
856{
d1e96383 857 return ((flag_sanitize & SANITIZE_THREAD) != 0
858 && !lookup_attribute ("no_sanitize_thread",
859 DECL_ATTRIBUTES (current_function_decl)));
31315c24 860}
861
65b0537f 862 virtual unsigned int execute (function *) { return tsan_pass (); }
cbe8bda8 863
864}; // class pass_tsan
865
866} // anon namespace
867
868gimple_opt_pass *
869make_pass_tsan (gcc::context *ctxt)
870{
871 return new pass_tsan (ctxt);
872}
873
cbe8bda8 874namespace {
875
876const pass_data pass_data_tsan_O0 =
b077695d 877{
cbe8bda8 878 GIMPLE_PASS, /* type */
879 "tsan0", /* name */
880 OPTGROUP_NONE, /* optinfo_flags */
cbe8bda8 881 TV_NONE, /* tv_id */
882 ( PROP_ssa | PROP_cfg ), /* properties_required */
883 0, /* properties_provided */
884 0, /* properties_destroyed */
885 0, /* todo_flags_start */
8b88439e 886 TODO_update_ssa, /* todo_flags_finish */
b077695d 887};
cbe8bda8 888
889class pass_tsan_O0 : public gimple_opt_pass
890{
891public:
9af5ce0c 892 pass_tsan_O0 (gcc::context *ctxt)
893 : gimple_opt_pass (pass_data_tsan_O0, ctxt)
cbe8bda8 894 {}
895
896 /* opt_pass methods: */
31315c24 897 virtual bool gate (function *)
898 {
d1e96383 899 return ((flag_sanitize & SANITIZE_THREAD) != 0 && !optimize
900 && !lookup_attribute ("no_sanitize_thread",
901 DECL_ATTRIBUTES (current_function_decl)));
31315c24 902 }
903
65b0537f 904 virtual unsigned int execute (function *) { return tsan_pass (); }
cbe8bda8 905
906}; // class pass_tsan_O0
907
908} // anon namespace
909
910gimple_opt_pass *
911make_pass_tsan_O0 (gcc::context *ctxt)
912{
913 return new pass_tsan_O0 (ctxt);
914}
Mirror of https://gcc.gnu.org/git/gcc.git