gcc/tsan.c

   1 /* GCC instrumentation plugin for ThreadSanitizer.
   2    Copyright (C) 2011-2013 Free Software Foundation, Inc.
   3    Contributed by Dmitry Vyukov <dvyukov@google.com>
   4
   5 This file is part of GCC.
   6
   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.
  11
  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.
  16
  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/>.  */
  20
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tree.h"
  26 #include "intl.h"
  27 #include "tm.h"
  28 #include "basic-block.h"
  29 #include "gimple.h"
  30 #include "gimplify.h"
  31 #include "gimple-iterator.h"
  32 #include "function.h"
  33 #include "gimple-ssa.h"
  34 #include "cgraph.h"
  35 #include "tree-cfg.h"
  36 #include "tree-ssanames.h"
  37 #include "tree-pass.h"
  38 #include "tree-iterator.h"
  39 #include "langhooks.h"
  40 #include "output.h"
  41 #include "options.h"
  42 #include "target.h"
  43 #include "diagnostic.h"
  44 #include "tree-ssa-propagate.h"
  45 #include "tsan.h"
  46 #include "asan.h"
  47
  48 /* Number of instrumented memory accesses in the current function.  */
  49
  50 /* Builds the following decl
  51    void __tsan_read/writeX (void *addr);  */
  52
  53 static tree
  54 get_memory_access_decl (bool is_write, unsigned size)
  55 {
  56   enum built_in_function fcode;
  57
  58   if (size <= 1)
  59     fcode = is_write ? BUILT_IN_TSAN_WRITE1
  60                      : BUILT_IN_TSAN_READ1;
  61   else if (size <= 3)
  62     fcode = is_write ? BUILT_IN_TSAN_WRITE2
  63                      : BUILT_IN_TSAN_READ2;
  64   else if (size <= 7)
  65     fcode = is_write ? BUILT_IN_TSAN_WRITE4
  66                      : BUILT_IN_TSAN_READ4;
  67   else if (size <= 15)
  68     fcode = is_write ? BUILT_IN_TSAN_WRITE8
  69                      : BUILT_IN_TSAN_READ8;
  70   else
  71     fcode = is_write ? BUILT_IN_TSAN_WRITE16
  72                      : BUILT_IN_TSAN_READ16;
  73
  74   return builtin_decl_implicit (fcode);
  75 }
  76
  77 /* Check as to whether EXPR refers to a store to vptr.  */
  78
  79 static tree
  80 is_vptr_store (gimple stmt, tree expr, bool is_write)
  81 {
  82   if (is_write == true
  83       && gimple_assign_single_p (stmt)
  84       && TREE_CODE (expr) == COMPONENT_REF)
  85     {
  86       tree field = TREE_OPERAND (expr, 1);
  87       if (TREE_CODE (field) == FIELD_DECL
  88           && DECL_VIRTUAL_P (field))
  89         return gimple_assign_rhs1 (stmt);
  90     }
  91   return NULL;
  92 }
  93
  94 /* Instruments EXPR if needed. If any instrumentation is inserted,
  95    return true.  */
  96
  97 static bool
  98 instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
  99 {
 100   tree base, rhs, expr_ptr, builtin_decl;
 101   basic_block bb;
 102   HOST_WIDE_INT size;
 103   gimple stmt, g;
 104   gimple_seq seq;
 105   location_t loc;
 106
 107   size = int_size_in_bytes (TREE_TYPE (expr));
 108   if (size == -1)
 109     return false;
 110
 111   /* For now just avoid instrumenting bit field acceses.
 112      TODO: handle bit-fields as if touching the whole field.  */
 113   HOST_WIDE_INT bitsize, bitpos;
 114   tree offset;
 115   enum machine_mode mode;
 116   int volatilep = 0, unsignedp = 0;
 117   base = get_inner_reference (expr, &bitsize, &bitpos, &offset,
 118                               &mode, &unsignedp, &volatilep, false);
 119
 120   /* No need to instrument accesses to decls that don't escape,
 121      they can't escape to other threads then.  */
 122   if (DECL_P (base))
 123     {
 124       struct pt_solution pt;
 125       memset (&pt, 0, sizeof (pt));
 126       pt.escaped = 1;
 127       pt.ipa_escaped = flag_ipa_pta != 0;
 128       pt.nonlocal = 1;
 129       if (!pt_solution_includes (&pt, base))
 130         return false;
 131       if (!is_global_var (base) && !may_be_aliased (base))
 132         return false;
 133     }
 134
 135   if (TREE_READONLY (base)
 136       || (TREE_CODE (base) == VAR_DECL
 137           && DECL_HARD_REGISTER (base)))
 138     return false;
 139
 140   if (size == 0
 141       || bitpos % (size * BITS_PER_UNIT)
 142       || bitsize != size * BITS_PER_UNIT)
 143     return false;
 144
 145   stmt = gsi_stmt (gsi);
 146   loc = gimple_location (stmt);
 147   rhs = is_vptr_store (stmt, expr, is_write);
 148   gcc_checking_assert (rhs != NULL || is_gimple_addressable (expr));
 149   expr_ptr = build_fold_addr_expr (unshare_expr (expr));
 150   seq = NULL;
 151   if (!is_gimple_val (expr_ptr))
 152     {
 153       g = gimple_build_assign (make_ssa_name (TREE_TYPE (expr_ptr), NULL),
 154                                expr_ptr);
 155       expr_ptr = gimple_assign_lhs (g);
 156       gimple_set_location (g, loc);
 157       gimple_seq_add_stmt_without_update (&seq, g);
 158     }
 159   if (rhs == NULL)
 160     g = gimple_build_call (get_memory_access_decl (is_write, size),
 161                            1, expr_ptr);
 162   else
 163     {
 164       builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
 165       g = gimple_build_call (builtin_decl, 1, expr_ptr);
 166     }
 167   gimple_set_location (g, loc);
 168   gimple_seq_add_stmt_without_update (&seq, g);
 169   /* Instrumentation for assignment of a function result
 170      must be inserted after the call.  Instrumentation for
 171      reads of function arguments must be inserted before the call.
 172      That's because the call can contain synchronization.  */
 173   if (is_gimple_call (stmt) && is_write)
 174     {
 175       /* If the call can throw, it must be the last stmt in
 176          a basic block, so the instrumented stmts need to be
 177          inserted in successor bbs.  */
 178       if (is_ctrl_altering_stmt (stmt))
 179         {
 180           edge e;
 181
 182           bb = gsi_bb (gsi);
 183           e = find_fallthru_edge (bb->succs);
 184           if (e)
 185             gsi_insert_seq_on_edge_immediate (e, seq);
 186         }
 187       else
 188         gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
 189     }
 190   else
 191     gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
 192
 193   return true;
 194 }
 195
 196 /* Actions for sync/atomic builtin transformations.  */
 197 enum tsan_atomic_action
 198 {
 199   check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
 200   bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst
 201 };
 202
 203 /* Table how to map sync/atomic builtins to their corresponding
 204    tsan equivalents.  */
 205 static const struct tsan_map_atomic
 206 {
 207   enum built_in_function fcode, tsan_fcode;
 208   enum tsan_atomic_action action;
 209   enum tree_code code;
 210 } tsan_atomic_table[] =
 211 {
 212 #define TRANSFORM(fcode, tsan_fcode, action, code) \
 213   { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
 214 #define CHECK_LAST(fcode, tsan_fcode) \
 215   TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
 216 #define ADD_SEQ_CST(fcode, tsan_fcode) \
 217   TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
 218 #define ADD_ACQUIRE(fcode, tsan_fcode) \
 219   TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
 220 #define WEAK_CAS(fcode, tsan_fcode) \
 221   TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
 222 #define STRONG_CAS(fcode, tsan_fcode) \
 223   TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
 224 #define BOOL_CAS(fcode, tsan_fcode) \
 225   TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
 226 #define VAL_CAS(fcode, tsan_fcode) \
 227   TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
 228 #define LOCK_RELEASE(fcode, tsan_fcode) \
 229   TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
 230 #define FETCH_OP(fcode, tsan_fcode, code) \
 231   TRANSFORM (fcode, tsan_fcode, fetch_op, code)
 232 #define FETCH_OPS(fcode, tsan_fcode, code) \
 233   TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
 234
 235   CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
 236   CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
 237   CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
 238   CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
 239   CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
 240   CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
 241   CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
 242   CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
 243   CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
 244   CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
 245   CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
 246   CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
 247   CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
 248   CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
 249   CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
 250   CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
 251   CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
 252   CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
 253   CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
 254   CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
 255   CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
 256   CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
 257   CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
 258   CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
 259   CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
 260   CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
 261   CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
 262   CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
 263   CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
 264   CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
 265   CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
 266   CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
 267   CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
 268   CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
 269   CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
 270   CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
 271   CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
 272   CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
 273   CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
 274   CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
 275   CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
 276   CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
 277   CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
 278   CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
 279   CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
 280
 281   CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
 282   CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
 283
 284   FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
 285   FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
 286   FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
 287   FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
 288   FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
 289   FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
 290   FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
 291   FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
 292   FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
 293   FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
 294   FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
 295   FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
 296   FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
 297   FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
 298   FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
 299   FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
 300   FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
 301   FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
 302   FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
 303   FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
 304   FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
 305   FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
 306   FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
 307   FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
 308   FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
 309   FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
 310   FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
 311   FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
 312   FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
 313   FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
 314
 315   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
 316   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
 317   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
 318   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
 319   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
 320
 321   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
 322   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
 323   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
 324   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
 325   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
 326   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
 327   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
 328   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
 329   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
 330   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
 331   ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
 332   ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
 333   ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
 334   ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
 335   ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
 336   ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
 337   ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
 338   ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
 339   ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
 340   ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
 341   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
 342   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
 343   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
 344   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
 345   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
 346   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
 347   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
 348   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
 349   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
 350   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
 351
 352   ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
 353
 354   FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
 355   FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
 356   FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
 357   FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
 358   FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
 359   FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
 360   FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
 361   FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
 362   FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
 363   FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
 364   FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
 365   FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
 366   FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
 367   FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
 368   FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
 369   FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
 370   FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
 371   FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
 372   FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
 373   FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
 374   FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
 375   FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
 376   FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
 377   FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
 378   FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
 379   FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
 380   FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
 381   FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
 382   FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
 383   FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
 384
 385   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
 386   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
 387   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
 388   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
 389   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
 390
 391   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 392   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
 393               TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 394   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
 395               TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 396   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
 397               TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 398   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
 399               TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 400
 401   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
 402             TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 403   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
 404             TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 405   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
 406             TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 407   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
 408             TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 409   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
 410             TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 411
 412   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 413   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 414   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 415   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 416   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
 417            TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 418
 419   LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
 420   LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
 421   LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
 422   LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
 423   LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE)
 424 };
 425
 426 /* Instrument an atomic builtin.  */
 427
 428 static void
 429 instrument_builtin_call (gimple_stmt_iterator *gsi)
 430 {
 431   gimple stmt = gsi_stmt (*gsi), g;
 432   tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
 433   enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
 434   unsigned int i, num = gimple_call_num_args (stmt), j;
 435   for (j = 0; j < 6 && j < num; j++)
 436     args[j] = gimple_call_arg (stmt, j);
 437   for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
 438     if (fcode != tsan_atomic_table[i].fcode)
 439       continue;
 440     else
 441       {
 442         tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
 443         if (decl == NULL_TREE)
 444           return;
 445         switch (tsan_atomic_table[i].action)
 446           {
 447           case check_last:
 448           case fetch_op:
 449             last_arg = gimple_call_arg (stmt, num - 1);
 450             if (!tree_fits_uhwi_p (last_arg)
 451                 || tree_to_uhwi (last_arg) > MEMMODEL_SEQ_CST)
 452               return;
 453             gimple_call_set_fndecl (stmt, decl);
 454             update_stmt (stmt);
 455             if (tsan_atomic_table[i].action == fetch_op)
 456               {
 457                 args[1] = gimple_call_arg (stmt, 1);
 458                 goto adjust_result;
 459               }
 460             return;
 461           case add_seq_cst:
 462           case add_acquire:
 463           case fetch_op_seq_cst:
 464             gcc_assert (num <= 2);
 465             for (j = 0; j < num; j++)
 466               args[j] = gimple_call_arg (stmt, j);
 467             for (; j < 2; j++)
 468               args[j] = NULL_TREE;
 469             args[num] = build_int_cst (NULL_TREE,
 470                                        tsan_atomic_table[i].action
 471                                        != add_acquire
 472                                        ? MEMMODEL_SEQ_CST
 473                                        : MEMMODEL_ACQUIRE);
 474             update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
 475             stmt = gsi_stmt (*gsi);
 476             if (tsan_atomic_table[i].action == fetch_op_seq_cst)
 477               {
 478               adjust_result:
 479                 lhs = gimple_call_lhs (stmt);
 480                 if (lhs == NULL_TREE)
 481                   return;
 482                 if (!useless_type_conversion_p (TREE_TYPE (lhs),
 483                                                 TREE_TYPE (args[1])))
 484                   {
 485                     tree var = make_ssa_name (TREE_TYPE (lhs), NULL);
 486                     g = gimple_build_assign_with_ops (NOP_EXPR, var,
 487                                                       args[1], NULL_TREE);
 488                     gsi_insert_after (gsi, g, GSI_NEW_STMT);
 489                     args[1] = var;
 490                   }
 491                 gimple_call_set_lhs (stmt,
 492                                      make_ssa_name (TREE_TYPE (lhs), NULL));
 493                 /* BIT_NOT_EXPR stands for NAND.  */
 494                 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
 495                   {
 496                     tree var = make_ssa_name (TREE_TYPE (lhs), NULL);
 497                     g = gimple_build_assign_with_ops (BIT_AND_EXPR, var,
 498                                                       gimple_call_lhs (stmt),
 499                                                       args[1]);
 500                     gsi_insert_after (gsi, g, GSI_NEW_STMT);
 501                     g = gimple_build_assign_with_ops (BIT_NOT_EXPR, lhs, var,
 502                                                       NULL_TREE);
 503                   }
 504                 else
 505                   g = gimple_build_assign_with_ops (tsan_atomic_table[i].code,
 506                                                     lhs,
 507                                                     gimple_call_lhs (stmt),
 508                                                     args[1]);
 509                 update_stmt (stmt);
 510                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 511               }
 512             return;
 513           case weak_cas:
 514             if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
 515               continue;
 516             /* FALLTHRU */
 517           case strong_cas:
 518             gcc_assert (num == 6);
 519             for (j = 0; j < 6; j++)
 520               args[j] = gimple_call_arg (stmt, j);
 521             if (!tree_fits_uhwi_p (args[4])
 522                 || tree_to_uhwi (args[4]) > MEMMODEL_SEQ_CST)
 523               return;
 524             if (!tree_fits_uhwi_p (args[5])
 525                 || tree_to_uhwi (args[5]) > MEMMODEL_SEQ_CST)
 526               return;
 527             update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
 528                                 args[4], args[5]);
 529             return;
 530           case bool_cas:
 531           case val_cas:
 532             gcc_assert (num == 3);
 533             for (j = 0; j < 3; j++)
 534               args[j] = gimple_call_arg (stmt, j);
 535             t = TYPE_ARG_TYPES (TREE_TYPE (decl));
 536             t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
 537             t = create_tmp_var (t, NULL);
 538             mark_addressable (t);
 539             if (!useless_type_conversion_p (TREE_TYPE (t),
 540                                             TREE_TYPE (args[1])))
 541               {
 542                 g = gimple_build_assign_with_ops (NOP_EXPR,
 543                                                   make_ssa_name (TREE_TYPE (t),
 544                                                                  NULL),
 545                                                   args[1], NULL_TREE);
 546                 gsi_insert_before (gsi, g, GSI_SAME_STMT);
 547                 args[1] = gimple_assign_lhs (g);
 548               }
 549             g = gimple_build_assign (t, args[1]);
 550             gsi_insert_before (gsi, g, GSI_SAME_STMT);
 551             lhs = gimple_call_lhs (stmt);
 552             update_gimple_call (gsi, decl, 5, args[0],
 553                                 build_fold_addr_expr (t), args[2],
 554                                 build_int_cst (NULL_TREE,
 555                                                MEMMODEL_SEQ_CST),
 556                                 build_int_cst (NULL_TREE,
 557                                                MEMMODEL_SEQ_CST));
 558             if (tsan_atomic_table[i].action == val_cas && lhs)
 559               {
 560                 tree cond;
 561                 stmt = gsi_stmt (*gsi);
 562                 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t), NULL),
 563                                          t);
 564                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 565                 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
 566                 cond = build2 (NE_EXPR, boolean_type_node, t,
 567                                build_int_cst (TREE_TYPE (t), 0));
 568                 g = gimple_build_assign_with_ops (COND_EXPR, lhs, cond,
 569                                                   args[1],
 570                                                   gimple_assign_lhs (g));
 571                 gimple_call_set_lhs (stmt, t);
 572                 update_stmt (stmt);
 573                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 574               }
 575             return;
 576           case lock_release:
 577             gcc_assert (num == 1);
 578             t = TYPE_ARG_TYPES (TREE_TYPE (decl));
 579             t = TREE_VALUE (TREE_CHAIN (t));
 580             update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
 581                                 build_int_cst (t, 0),
 582                                 build_int_cst (NULL_TREE,
 583                                                MEMMODEL_RELEASE));
 584             return;
 585           default:
 586             continue;
 587           }
 588       }
 589 }
 590
 591 /* Instruments the gimple pointed to by GSI. Return
 592    true if func entry/exit should be instrumented.  */
 593
 594 static bool
 595 instrument_gimple (gimple_stmt_iterator *gsi)
 596 {
 597   gimple stmt;
 598   tree rhs, lhs;
 599   bool instrumented = false;
 600
 601   stmt = gsi_stmt (*gsi);
 602   if (is_gimple_call (stmt)
 603       && (gimple_call_fndecl (stmt)
 604           != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
 605     {
 606       if (is_gimple_builtin_call (stmt))
 607         instrument_builtin_call (gsi);
 608       return true;
 609     }
 610   else if (is_gimple_assign (stmt)
 611            && !gimple_clobber_p (stmt))
 612     {
 613       if (gimple_store_p (stmt))
 614         {
 615           lhs = gimple_assign_lhs (stmt);
 616           instrumented = instrument_expr (*gsi, lhs, true);
 617         }
 618       if (gimple_assign_load_p (stmt))
 619         {
 620           rhs = gimple_assign_rhs1 (stmt);
 621           instrumented = instrument_expr (*gsi, rhs, false);
 622         }
 623     }
 624   return instrumented;
 625 }
 626
 627 /* Instruments all interesting memory accesses in the current function.
 628    Return true if func entry/exit should be instrumented.  */
 629
 630 static bool
 631 instrument_memory_accesses (void)
 632 {
 633   basic_block bb;
 634   gimple_stmt_iterator gsi;
 635   bool fentry_exit_instrument = false;
 636
 637   FOR_EACH_BB (bb)
 638     for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
 639       fentry_exit_instrument |= instrument_gimple (&gsi);
 640   return fentry_exit_instrument;
 641 }
 642
 643 /* Instruments function entry.  */
 644
 645 static void
 646 instrument_func_entry (void)
 647 {
 648   basic_block succ_bb;
 649   gimple_stmt_iterator gsi;
 650   tree ret_addr, builtin_decl;
 651   gimple g;
 652
 653   succ_bb = single_succ (ENTRY_BLOCK_PTR);
 654   gsi = gsi_after_labels (succ_bb);
 655
 656   builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
 657   g = gimple_build_call (builtin_decl, 1, integer_zero_node);
 658   ret_addr = make_ssa_name (ptr_type_node, NULL);
 659   gimple_call_set_lhs (g, ret_addr);
 660   gimple_set_location (g, cfun->function_start_locus);
 661   gsi_insert_before (&gsi, g, GSI_SAME_STMT);
 662
 663   builtin_decl =  builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
 664   g = gimple_build_call (builtin_decl, 1, ret_addr);
 665   gimple_set_location (g, cfun->function_start_locus);
 666   gsi_insert_before (&gsi, g, GSI_SAME_STMT);
 667 }
 668
 669 /* Instruments function exits.  */
 670
 671 static void
 672 instrument_func_exit (void)
 673 {
 674   location_t loc;
 675   basic_block exit_bb;
 676   gimple_stmt_iterator gsi;
 677   gimple stmt, g;
 678   tree builtin_decl;
 679   edge e;
 680   edge_iterator ei;
 681
 682   /* Find all function exits.  */
 683   exit_bb = EXIT_BLOCK_PTR;
 684   FOR_EACH_EDGE (e, ei, exit_bb->preds)
 685     {
 686       gsi = gsi_last_bb (e->src);
 687       stmt = gsi_stmt (gsi);
 688       gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
 689                   || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
 690       loc = gimple_location (stmt);
 691       builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
 692       g = gimple_build_call (builtin_decl, 0);
 693       gimple_set_location (g, loc);
 694       gsi_insert_before (&gsi, g, GSI_SAME_STMT);
 695     }
 696 }
 697
 698 /* ThreadSanitizer instrumentation pass.  */
 699
 700 static unsigned
 701 tsan_pass (void)
 702 {
 703   initialize_sanitizer_builtins ();
 704   if (instrument_memory_accesses ())
 705     {
 706       instrument_func_entry ();
 707       instrument_func_exit ();
 708     }
 709   return 0;
 710 }
 711
 712 /* The pass's gate.  */
 713
 714 static bool
 715 tsan_gate (void)
 716 {
 717   return (flag_sanitize & SANITIZE_THREAD) != 0;
 718 }
 719
 720 /* Inserts __tsan_init () into the list of CTORs.  */
 721
 722 void
 723 tsan_finish_file (void)
 724 {
 725   tree ctor_statements = NULL_TREE;
 726
 727   initialize_sanitizer_builtins ();
 728   tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
 729   append_to_statement_list (build_call_expr (init_decl, 0),
 730                             &ctor_statements);
 731   cgraph_build_static_cdtor ('I', ctor_statements,
 732                              MAX_RESERVED_INIT_PRIORITY - 1);
 733 }
 734
 735 /* The pass descriptor.  */
 736
 737 namespace {
 738
 739 const pass_data pass_data_tsan =
 740 {
 741   GIMPLE_PASS, /* type */
 742   "tsan", /* name */
 743   OPTGROUP_NONE, /* optinfo_flags */
 744   true, /* has_gate */
 745   true, /* has_execute */
 746   TV_NONE, /* tv_id */
 747   ( PROP_ssa | PROP_cfg ), /* properties_required */
 748   0, /* properties_provided */
 749   0, /* properties_destroyed */
 750   0, /* todo_flags_start */
 751   ( TODO_verify_all | TODO_update_ssa ), /* todo_flags_finish */
 752 };
 753
 754 class pass_tsan : public gimple_opt_pass
 755 {
 756 public:
 757   pass_tsan (gcc::context *ctxt)
 758     : gimple_opt_pass (pass_data_tsan, ctxt)
 759   {}
 760
 761   /* opt_pass methods: */
 762   opt_pass * clone () { return new pass_tsan (m_ctxt); }
 763   bool gate () { return tsan_gate (); }
 764   unsigned int execute () { return tsan_pass (); }
 765
 766 }; // class pass_tsan
 767
 768 } // anon namespace
 769
 770 gimple_opt_pass *
 771 make_pass_tsan (gcc::context *ctxt)
 772 {
 773   return new pass_tsan (ctxt);
 774 }
 775
 776 static bool
 777 tsan_gate_O0 (void)
 778 {
 779   return (flag_sanitize & SANITIZE_THREAD) != 0 && !optimize;
 780 }
 781
 782 namespace {
 783
 784 const pass_data pass_data_tsan_O0 =
 785 {
 786   GIMPLE_PASS, /* type */
 787   "tsan0", /* name */
 788   OPTGROUP_NONE, /* optinfo_flags */
 789   true, /* has_gate */
 790   true, /* has_execute */
 791   TV_NONE, /* tv_id */
 792   ( PROP_ssa | PROP_cfg ), /* properties_required */
 793   0, /* properties_provided */
 794   0, /* properties_destroyed */
 795   0, /* todo_flags_start */
 796   ( TODO_verify_all | TODO_update_ssa ), /* todo_flags_finish */
 797 };
 798
 799 class pass_tsan_O0 : public gimple_opt_pass
 800 {
 801 public:
 802   pass_tsan_O0 (gcc::context *ctxt)
 803     : gimple_opt_pass (pass_data_tsan_O0, ctxt)
 804   {}
 805
 806   /* opt_pass methods: */
 807   bool gate () { return tsan_gate_O0 (); }
 808   unsigned int execute () { return tsan_pass (); }
 809
 810 }; // class pass_tsan_O0
 811
 812 } // anon namespace
 813
 814 gimple_opt_pass *
 815 make_pass_tsan_O0 (gcc::context *ctxt)
 816 {
 817   return new pass_tsan_O0 (ctxt);
 818 }