gcc/tsan.c

   1 /* GCC instrumentation plugin for ThreadSanitizer.
   2    Copyright (C) 2011-2015 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 "expr.h"
  27 #include "intl.h"
  28 #include "tm.h"
  29 #include "predict.h"
  30 #include "vec.h"
  31 #include "hashtab.h"
  32 #include "hash-set.h"
  33 #include "machmode.h"
  34 #include "hard-reg-set.h"
  35 #include "input.h"
  36 #include "function.h"
  37 #include "dominance.h"
  38 #include "cfg.h"
  39 #include "basic-block.h"
  40 #include "tree-ssa-alias.h"
  41 #include "internal-fn.h"
  42 #include "gimple-expr.h"
  43 #include "is-a.h"
  44 #include "gimple.h"
  45 #include "gimplify.h"
  46 #include "gimple-iterator.h"
  47 #include "gimple-ssa.h"
  48 #include "hash-map.h"
  49 #include "plugin-api.h"
  50 #include "ipa-ref.h"
  51 #include "cgraph.h"
  52 #include "tree-cfg.h"
  53 #include "stringpool.h"
  54 #include "tree-ssanames.h"
  55 #include "tree-pass.h"
  56 #include "tree-iterator.h"
  57 #include "langhooks.h"
  58 #include "output.h"
  59 #include "options.h"
  60 #include "target.h"
  61 #include "diagnostic.h"
  62 #include "tree-ssa-propagate.h"
  63 #include "tsan.h"
  64 #include "asan.h"
  65 #include "builtins.h"
  66
  67 /* Number of instrumented memory accesses in the current function.  */
  68
  69 /* Builds the following decl
  70    void __tsan_read/writeX (void *addr);  */
  71
  72 static tree
  73 get_memory_access_decl (bool is_write, unsigned size)
  74 {
  75   enum built_in_function fcode;
  76
  77   if (size <= 1)
  78     fcode = is_write ? BUILT_IN_TSAN_WRITE1
  79                      : BUILT_IN_TSAN_READ1;
  80   else if (size <= 3)
  81     fcode = is_write ? BUILT_IN_TSAN_WRITE2
  82                      : BUILT_IN_TSAN_READ2;
  83   else if (size <= 7)
  84     fcode = is_write ? BUILT_IN_TSAN_WRITE4
  85                      : BUILT_IN_TSAN_READ4;
  86   else if (size <= 15)
  87     fcode = is_write ? BUILT_IN_TSAN_WRITE8
  88                      : BUILT_IN_TSAN_READ8;
  89   else
  90     fcode = is_write ? BUILT_IN_TSAN_WRITE16
  91                      : BUILT_IN_TSAN_READ16;
  92
  93   return builtin_decl_implicit (fcode);
  94 }
  95
  96 /* Check as to whether EXPR refers to a store to vptr.  */
  97
  98 static tree
  99 is_vptr_store (gimple stmt, tree expr, bool is_write)
 100 {
 101   if (is_write == true
 102       && gimple_assign_single_p (stmt)
 103       && TREE_CODE (expr) == COMPONENT_REF)
 104     {
 105       tree field = TREE_OPERAND (expr, 1);
 106       if (TREE_CODE (field) == FIELD_DECL
 107           && DECL_VIRTUAL_P (field))
 108         return gimple_assign_rhs1 (stmt);
 109     }
 110   return NULL;
 111 }
 112
 113 /* Instruments EXPR if needed. If any instrumentation is inserted,
 114    return true.  */
 115
 116 static bool
 117 instrument_expr (gimple_stmt_iterator gsi, tree expr, bool is_write)
 118 {
 119   tree base, rhs, expr_ptr, builtin_decl;
 120   basic_block bb;
 121   HOST_WIDE_INT size;
 122   gimple stmt, g;
 123   gimple_seq seq;
 124   location_t loc;
 125   unsigned int align;
 126
 127   size = int_size_in_bytes (TREE_TYPE (expr));
 128   if (size <= 0)
 129     return false;
 130
 131   HOST_WIDE_INT bitsize, bitpos;
 132   tree offset;
 133   machine_mode mode;
 134   int volatilep = 0, unsignedp = 0;
 135   base = get_inner_reference (expr, &bitsize, &bitpos, &offset,
 136                               &mode, &unsignedp, &volatilep, false);
 137
 138   /* No need to instrument accesses to decls that don't escape,
 139      they can't escape to other threads then.  */
 140   if (DECL_P (base))
 141     {
 142       struct pt_solution pt;
 143       memset (&pt, 0, sizeof (pt));
 144       pt.escaped = 1;
 145       pt.ipa_escaped = flag_ipa_pta != 0;
 146       pt.nonlocal = 1;
 147       if (!pt_solution_includes (&pt, base))
 148         return false;
 149       if (!is_global_var (base) && !may_be_aliased (base))
 150         return false;
 151     }
 152
 153   if (TREE_READONLY (base)
 154       || (TREE_CODE (base) == VAR_DECL
 155           && DECL_HARD_REGISTER (base)))
 156     return false;
 157
 158   stmt = gsi_stmt (gsi);
 159   loc = gimple_location (stmt);
 160   rhs = is_vptr_store (stmt, expr, is_write);
 161   seq = NULL;
 162
 163   if ((TREE_CODE (expr) == COMPONENT_REF
 164        && DECL_BIT_FIELD_TYPE (TREE_OPERAND (expr, 1)))
 165       || TREE_CODE (expr) == BIT_FIELD_REF)
 166     {
 167       base = TREE_OPERAND (expr, 0);
 168       if (TREE_CODE (expr) == COMPONENT_REF)
 169         {
 170           expr = TREE_OPERAND (expr, 1);
 171           if (is_write && DECL_BIT_FIELD_REPRESENTATIVE (expr))
 172             expr = DECL_BIT_FIELD_REPRESENTATIVE (expr);
 173           if (!tree_fits_uhwi_p (DECL_FIELD_OFFSET (expr))
 174               || !tree_fits_uhwi_p (DECL_FIELD_BIT_OFFSET (expr))
 175               || !tree_fits_uhwi_p (DECL_SIZE (expr)))
 176             return false;
 177           bitpos = tree_to_uhwi (DECL_FIELD_OFFSET (expr)) * BITS_PER_UNIT
 178                    + tree_to_uhwi (DECL_FIELD_BIT_OFFSET (expr));
 179           bitsize = tree_to_uhwi (DECL_SIZE (expr));
 180         }
 181       else
 182         {
 183           if (!tree_fits_uhwi_p (TREE_OPERAND (expr, 2))
 184               || !tree_fits_uhwi_p (TREE_OPERAND (expr, 1)))
 185             return false;
 186           bitpos = tree_to_uhwi (TREE_OPERAND (expr, 2));
 187           bitsize = tree_to_uhwi (TREE_OPERAND (expr, 1));
 188         }
 189       if (bitpos < 0 || bitsize <= 0)
 190         return false;
 191       size = (bitpos % BITS_PER_UNIT + bitsize + BITS_PER_UNIT - 1)
 192              / BITS_PER_UNIT;
 193       align = get_object_alignment (base);
 194       if (align < BITS_PER_UNIT)
 195         return false;
 196       bitpos = bitpos & ~(BITS_PER_UNIT - 1);
 197       if ((align - 1) & bitpos)
 198         {
 199           align = (align - 1) & bitpos;
 200           align = align & -align;
 201         }
 202       gcc_checking_assert (is_gimple_addressable (base));
 203       expr = build_fold_addr_expr (unshare_expr (base));
 204       if (!is_gimple_mem_ref_addr (expr))
 205         {
 206           g = gimple_build_assign (make_ssa_name (TREE_TYPE (expr)), expr);
 207           expr = gimple_assign_lhs (g);
 208           gimple_set_location (g, loc);
 209           gimple_seq_add_stmt_without_update (&seq, g);
 210         }
 211       expr = build2 (MEM_REF, char_type_node, expr,
 212                      build_int_cst (TREE_TYPE (expr), bitpos / BITS_PER_UNIT));
 213       expr_ptr = build_fold_addr_expr (expr);
 214     }
 215   else
 216     {
 217       align = get_object_alignment (expr);
 218       if (align < BITS_PER_UNIT)
 219         return false;
 220       gcc_checking_assert (is_gimple_addressable (expr));
 221       expr_ptr = build_fold_addr_expr (unshare_expr (expr));
 222     }
 223   if (!is_gimple_val (expr_ptr))
 224     {
 225       g = gimple_build_assign (make_ssa_name (TREE_TYPE (expr_ptr)), expr_ptr);
 226       expr_ptr = gimple_assign_lhs (g);
 227       gimple_set_location (g, loc);
 228       gimple_seq_add_stmt_without_update (&seq, g);
 229     }
 230   if ((size & (size - 1)) != 0 || size > 16
 231       || align < MIN (size, 8) * BITS_PER_UNIT)
 232     {
 233       builtin_decl = builtin_decl_implicit (is_write
 234                                             ? BUILT_IN_TSAN_WRITE_RANGE
 235                                             : BUILT_IN_TSAN_READ_RANGE);
 236       g = gimple_build_call (builtin_decl, 2, expr_ptr, size_int (size));
 237     }
 238   else if (rhs == NULL)
 239     g = gimple_build_call (get_memory_access_decl (is_write, size),
 240                            1, expr_ptr);
 241   else
 242     {
 243       builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_VPTR_UPDATE);
 244       g = gimple_build_call (builtin_decl, 1, expr_ptr);
 245     }
 246   gimple_set_location (g, loc);
 247   gimple_seq_add_stmt_without_update (&seq, g);
 248   /* Instrumentation for assignment of a function result
 249      must be inserted after the call.  Instrumentation for
 250      reads of function arguments must be inserted before the call.
 251      That's because the call can contain synchronization.  */
 252   if (is_gimple_call (stmt) && is_write)
 253     {
 254       /* If the call can throw, it must be the last stmt in
 255          a basic block, so the instrumented stmts need to be
 256          inserted in successor bbs.  */
 257       if (is_ctrl_altering_stmt (stmt))
 258         {
 259           edge e;
 260
 261           bb = gsi_bb (gsi);
 262           e = find_fallthru_edge (bb->succs);
 263           if (e)
 264             gsi_insert_seq_on_edge_immediate (e, seq);
 265         }
 266       else
 267         gsi_insert_seq_after (&gsi, seq, GSI_NEW_STMT);
 268     }
 269   else
 270     gsi_insert_seq_before (&gsi, seq, GSI_SAME_STMT);
 271
 272   return true;
 273 }
 274
 275 /* Actions for sync/atomic builtin transformations.  */
 276 enum tsan_atomic_action
 277 {
 278   check_last, add_seq_cst, add_acquire, weak_cas, strong_cas,
 279   bool_cas, val_cas, lock_release, fetch_op, fetch_op_seq_cst
 280 };
 281
 282 /* Table how to map sync/atomic builtins to their corresponding
 283    tsan equivalents.  */
 284 static const struct tsan_map_atomic
 285 {
 286   enum built_in_function fcode, tsan_fcode;
 287   enum tsan_atomic_action action;
 288   enum tree_code code;
 289 } tsan_atomic_table[] =
 290 {
 291 #define TRANSFORM(fcode, tsan_fcode, action, code) \
 292   { BUILT_IN_##fcode, BUILT_IN_##tsan_fcode, action, code }
 293 #define CHECK_LAST(fcode, tsan_fcode) \
 294   TRANSFORM (fcode, tsan_fcode, check_last, ERROR_MARK)
 295 #define ADD_SEQ_CST(fcode, tsan_fcode) \
 296   TRANSFORM (fcode, tsan_fcode, add_seq_cst, ERROR_MARK)
 297 #define ADD_ACQUIRE(fcode, tsan_fcode) \
 298   TRANSFORM (fcode, tsan_fcode, add_acquire, ERROR_MARK)
 299 #define WEAK_CAS(fcode, tsan_fcode) \
 300   TRANSFORM (fcode, tsan_fcode, weak_cas, ERROR_MARK)
 301 #define STRONG_CAS(fcode, tsan_fcode) \
 302   TRANSFORM (fcode, tsan_fcode, strong_cas, ERROR_MARK)
 303 #define BOOL_CAS(fcode, tsan_fcode) \
 304   TRANSFORM (fcode, tsan_fcode, bool_cas, ERROR_MARK)
 305 #define VAL_CAS(fcode, tsan_fcode) \
 306   TRANSFORM (fcode, tsan_fcode, val_cas, ERROR_MARK)
 307 #define LOCK_RELEASE(fcode, tsan_fcode) \
 308   TRANSFORM (fcode, tsan_fcode, lock_release, ERROR_MARK)
 309 #define FETCH_OP(fcode, tsan_fcode, code) \
 310   TRANSFORM (fcode, tsan_fcode, fetch_op, code)
 311 #define FETCH_OPS(fcode, tsan_fcode, code) \
 312   TRANSFORM (fcode, tsan_fcode, fetch_op_seq_cst, code)
 313
 314   CHECK_LAST (ATOMIC_LOAD_1, TSAN_ATOMIC8_LOAD),
 315   CHECK_LAST (ATOMIC_LOAD_2, TSAN_ATOMIC16_LOAD),
 316   CHECK_LAST (ATOMIC_LOAD_4, TSAN_ATOMIC32_LOAD),
 317   CHECK_LAST (ATOMIC_LOAD_8, TSAN_ATOMIC64_LOAD),
 318   CHECK_LAST (ATOMIC_LOAD_16, TSAN_ATOMIC128_LOAD),
 319   CHECK_LAST (ATOMIC_STORE_1, TSAN_ATOMIC8_STORE),
 320   CHECK_LAST (ATOMIC_STORE_2, TSAN_ATOMIC16_STORE),
 321   CHECK_LAST (ATOMIC_STORE_4, TSAN_ATOMIC32_STORE),
 322   CHECK_LAST (ATOMIC_STORE_8, TSAN_ATOMIC64_STORE),
 323   CHECK_LAST (ATOMIC_STORE_16, TSAN_ATOMIC128_STORE),
 324   CHECK_LAST (ATOMIC_EXCHANGE_1, TSAN_ATOMIC8_EXCHANGE),
 325   CHECK_LAST (ATOMIC_EXCHANGE_2, TSAN_ATOMIC16_EXCHANGE),
 326   CHECK_LAST (ATOMIC_EXCHANGE_4, TSAN_ATOMIC32_EXCHANGE),
 327   CHECK_LAST (ATOMIC_EXCHANGE_8, TSAN_ATOMIC64_EXCHANGE),
 328   CHECK_LAST (ATOMIC_EXCHANGE_16, TSAN_ATOMIC128_EXCHANGE),
 329   CHECK_LAST (ATOMIC_FETCH_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
 330   CHECK_LAST (ATOMIC_FETCH_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
 331   CHECK_LAST (ATOMIC_FETCH_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
 332   CHECK_LAST (ATOMIC_FETCH_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
 333   CHECK_LAST (ATOMIC_FETCH_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
 334   CHECK_LAST (ATOMIC_FETCH_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
 335   CHECK_LAST (ATOMIC_FETCH_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
 336   CHECK_LAST (ATOMIC_FETCH_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
 337   CHECK_LAST (ATOMIC_FETCH_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
 338   CHECK_LAST (ATOMIC_FETCH_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
 339   CHECK_LAST (ATOMIC_FETCH_AND_1, TSAN_ATOMIC8_FETCH_AND),
 340   CHECK_LAST (ATOMIC_FETCH_AND_2, TSAN_ATOMIC16_FETCH_AND),
 341   CHECK_LAST (ATOMIC_FETCH_AND_4, TSAN_ATOMIC32_FETCH_AND),
 342   CHECK_LAST (ATOMIC_FETCH_AND_8, TSAN_ATOMIC64_FETCH_AND),
 343   CHECK_LAST (ATOMIC_FETCH_AND_16, TSAN_ATOMIC128_FETCH_AND),
 344   CHECK_LAST (ATOMIC_FETCH_OR_1, TSAN_ATOMIC8_FETCH_OR),
 345   CHECK_LAST (ATOMIC_FETCH_OR_2, TSAN_ATOMIC16_FETCH_OR),
 346   CHECK_LAST (ATOMIC_FETCH_OR_4, TSAN_ATOMIC32_FETCH_OR),
 347   CHECK_LAST (ATOMIC_FETCH_OR_8, TSAN_ATOMIC64_FETCH_OR),
 348   CHECK_LAST (ATOMIC_FETCH_OR_16, TSAN_ATOMIC128_FETCH_OR),
 349   CHECK_LAST (ATOMIC_FETCH_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
 350   CHECK_LAST (ATOMIC_FETCH_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
 351   CHECK_LAST (ATOMIC_FETCH_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
 352   CHECK_LAST (ATOMIC_FETCH_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
 353   CHECK_LAST (ATOMIC_FETCH_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
 354   CHECK_LAST (ATOMIC_FETCH_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
 355   CHECK_LAST (ATOMIC_FETCH_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
 356   CHECK_LAST (ATOMIC_FETCH_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
 357   CHECK_LAST (ATOMIC_FETCH_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
 358   CHECK_LAST (ATOMIC_FETCH_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
 359
 360   CHECK_LAST (ATOMIC_THREAD_FENCE, TSAN_ATOMIC_THREAD_FENCE),
 361   CHECK_LAST (ATOMIC_SIGNAL_FENCE, TSAN_ATOMIC_SIGNAL_FENCE),
 362
 363   FETCH_OP (ATOMIC_ADD_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
 364   FETCH_OP (ATOMIC_ADD_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
 365   FETCH_OP (ATOMIC_ADD_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
 366   FETCH_OP (ATOMIC_ADD_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
 367   FETCH_OP (ATOMIC_ADD_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
 368   FETCH_OP (ATOMIC_SUB_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
 369   FETCH_OP (ATOMIC_SUB_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
 370   FETCH_OP (ATOMIC_SUB_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
 371   FETCH_OP (ATOMIC_SUB_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
 372   FETCH_OP (ATOMIC_SUB_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
 373   FETCH_OP (ATOMIC_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
 374   FETCH_OP (ATOMIC_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
 375   FETCH_OP (ATOMIC_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
 376   FETCH_OP (ATOMIC_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
 377   FETCH_OP (ATOMIC_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
 378   FETCH_OP (ATOMIC_OR_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
 379   FETCH_OP (ATOMIC_OR_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
 380   FETCH_OP (ATOMIC_OR_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
 381   FETCH_OP (ATOMIC_OR_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
 382   FETCH_OP (ATOMIC_OR_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
 383   FETCH_OP (ATOMIC_XOR_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
 384   FETCH_OP (ATOMIC_XOR_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
 385   FETCH_OP (ATOMIC_XOR_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
 386   FETCH_OP (ATOMIC_XOR_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
 387   FETCH_OP (ATOMIC_XOR_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
 388   FETCH_OP (ATOMIC_NAND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
 389   FETCH_OP (ATOMIC_NAND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
 390   FETCH_OP (ATOMIC_NAND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
 391   FETCH_OP (ATOMIC_NAND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
 392   FETCH_OP (ATOMIC_NAND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
 393
 394   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_1, TSAN_ATOMIC8_EXCHANGE),
 395   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_2, TSAN_ATOMIC16_EXCHANGE),
 396   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_4, TSAN_ATOMIC32_EXCHANGE),
 397   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_8, TSAN_ATOMIC64_EXCHANGE),
 398   ADD_ACQUIRE (SYNC_LOCK_TEST_AND_SET_16, TSAN_ATOMIC128_EXCHANGE),
 399
 400   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_1, TSAN_ATOMIC8_FETCH_ADD),
 401   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_2, TSAN_ATOMIC16_FETCH_ADD),
 402   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_4, TSAN_ATOMIC32_FETCH_ADD),
 403   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_8, TSAN_ATOMIC64_FETCH_ADD),
 404   ADD_SEQ_CST (SYNC_FETCH_AND_ADD_16, TSAN_ATOMIC128_FETCH_ADD),
 405   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_1, TSAN_ATOMIC8_FETCH_SUB),
 406   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_2, TSAN_ATOMIC16_FETCH_SUB),
 407   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_4, TSAN_ATOMIC32_FETCH_SUB),
 408   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_8, TSAN_ATOMIC64_FETCH_SUB),
 409   ADD_SEQ_CST (SYNC_FETCH_AND_SUB_16, TSAN_ATOMIC128_FETCH_SUB),
 410   ADD_SEQ_CST (SYNC_FETCH_AND_AND_1, TSAN_ATOMIC8_FETCH_AND),
 411   ADD_SEQ_CST (SYNC_FETCH_AND_AND_2, TSAN_ATOMIC16_FETCH_AND),
 412   ADD_SEQ_CST (SYNC_FETCH_AND_AND_4, TSAN_ATOMIC32_FETCH_AND),
 413   ADD_SEQ_CST (SYNC_FETCH_AND_AND_8, TSAN_ATOMIC64_FETCH_AND),
 414   ADD_SEQ_CST (SYNC_FETCH_AND_AND_16, TSAN_ATOMIC128_FETCH_AND),
 415   ADD_SEQ_CST (SYNC_FETCH_AND_OR_1, TSAN_ATOMIC8_FETCH_OR),
 416   ADD_SEQ_CST (SYNC_FETCH_AND_OR_2, TSAN_ATOMIC16_FETCH_OR),
 417   ADD_SEQ_CST (SYNC_FETCH_AND_OR_4, TSAN_ATOMIC32_FETCH_OR),
 418   ADD_SEQ_CST (SYNC_FETCH_AND_OR_8, TSAN_ATOMIC64_FETCH_OR),
 419   ADD_SEQ_CST (SYNC_FETCH_AND_OR_16, TSAN_ATOMIC128_FETCH_OR),
 420   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_1, TSAN_ATOMIC8_FETCH_XOR),
 421   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_2, TSAN_ATOMIC16_FETCH_XOR),
 422   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_4, TSAN_ATOMIC32_FETCH_XOR),
 423   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_8, TSAN_ATOMIC64_FETCH_XOR),
 424   ADD_SEQ_CST (SYNC_FETCH_AND_XOR_16, TSAN_ATOMIC128_FETCH_XOR),
 425   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_1, TSAN_ATOMIC8_FETCH_NAND),
 426   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_2, TSAN_ATOMIC16_FETCH_NAND),
 427   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_4, TSAN_ATOMIC32_FETCH_NAND),
 428   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_8, TSAN_ATOMIC64_FETCH_NAND),
 429   ADD_SEQ_CST (SYNC_FETCH_AND_NAND_16, TSAN_ATOMIC128_FETCH_NAND),
 430
 431   ADD_SEQ_CST (SYNC_SYNCHRONIZE, TSAN_ATOMIC_THREAD_FENCE),
 432
 433   FETCH_OPS (SYNC_ADD_AND_FETCH_1, TSAN_ATOMIC8_FETCH_ADD, PLUS_EXPR),
 434   FETCH_OPS (SYNC_ADD_AND_FETCH_2, TSAN_ATOMIC16_FETCH_ADD, PLUS_EXPR),
 435   FETCH_OPS (SYNC_ADD_AND_FETCH_4, TSAN_ATOMIC32_FETCH_ADD, PLUS_EXPR),
 436   FETCH_OPS (SYNC_ADD_AND_FETCH_8, TSAN_ATOMIC64_FETCH_ADD, PLUS_EXPR),
 437   FETCH_OPS (SYNC_ADD_AND_FETCH_16, TSAN_ATOMIC128_FETCH_ADD, PLUS_EXPR),
 438   FETCH_OPS (SYNC_SUB_AND_FETCH_1, TSAN_ATOMIC8_FETCH_SUB, MINUS_EXPR),
 439   FETCH_OPS (SYNC_SUB_AND_FETCH_2, TSAN_ATOMIC16_FETCH_SUB, MINUS_EXPR),
 440   FETCH_OPS (SYNC_SUB_AND_FETCH_4, TSAN_ATOMIC32_FETCH_SUB, MINUS_EXPR),
 441   FETCH_OPS (SYNC_SUB_AND_FETCH_8, TSAN_ATOMIC64_FETCH_SUB, MINUS_EXPR),
 442   FETCH_OPS (SYNC_SUB_AND_FETCH_16, TSAN_ATOMIC128_FETCH_SUB, MINUS_EXPR),
 443   FETCH_OPS (SYNC_AND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_AND, BIT_AND_EXPR),
 444   FETCH_OPS (SYNC_AND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_AND, BIT_AND_EXPR),
 445   FETCH_OPS (SYNC_AND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_AND, BIT_AND_EXPR),
 446   FETCH_OPS (SYNC_AND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_AND, BIT_AND_EXPR),
 447   FETCH_OPS (SYNC_AND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_AND, BIT_AND_EXPR),
 448   FETCH_OPS (SYNC_OR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_OR, BIT_IOR_EXPR),
 449   FETCH_OPS (SYNC_OR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_OR, BIT_IOR_EXPR),
 450   FETCH_OPS (SYNC_OR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_OR, BIT_IOR_EXPR),
 451   FETCH_OPS (SYNC_OR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_OR, BIT_IOR_EXPR),
 452   FETCH_OPS (SYNC_OR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_OR, BIT_IOR_EXPR),
 453   FETCH_OPS (SYNC_XOR_AND_FETCH_1, TSAN_ATOMIC8_FETCH_XOR, BIT_XOR_EXPR),
 454   FETCH_OPS (SYNC_XOR_AND_FETCH_2, TSAN_ATOMIC16_FETCH_XOR, BIT_XOR_EXPR),
 455   FETCH_OPS (SYNC_XOR_AND_FETCH_4, TSAN_ATOMIC32_FETCH_XOR, BIT_XOR_EXPR),
 456   FETCH_OPS (SYNC_XOR_AND_FETCH_8, TSAN_ATOMIC64_FETCH_XOR, BIT_XOR_EXPR),
 457   FETCH_OPS (SYNC_XOR_AND_FETCH_16, TSAN_ATOMIC128_FETCH_XOR, BIT_XOR_EXPR),
 458   FETCH_OPS (SYNC_NAND_AND_FETCH_1, TSAN_ATOMIC8_FETCH_NAND, BIT_NOT_EXPR),
 459   FETCH_OPS (SYNC_NAND_AND_FETCH_2, TSAN_ATOMIC16_FETCH_NAND, BIT_NOT_EXPR),
 460   FETCH_OPS (SYNC_NAND_AND_FETCH_4, TSAN_ATOMIC32_FETCH_NAND, BIT_NOT_EXPR),
 461   FETCH_OPS (SYNC_NAND_AND_FETCH_8, TSAN_ATOMIC64_FETCH_NAND, BIT_NOT_EXPR),
 462   FETCH_OPS (SYNC_NAND_AND_FETCH_16, TSAN_ATOMIC128_FETCH_NAND, BIT_NOT_EXPR),
 463
 464   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_WEAK),
 465   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_WEAK),
 466   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_WEAK),
 467   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_WEAK),
 468   WEAK_CAS (ATOMIC_COMPARE_EXCHANGE_16, TSAN_ATOMIC128_COMPARE_EXCHANGE_WEAK),
 469
 470   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 471   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_2,
 472               TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 473   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_4,
 474               TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 475   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_8,
 476               TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 477   STRONG_CAS (ATOMIC_COMPARE_EXCHANGE_16,
 478               TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 479
 480   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_1,
 481             TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 482   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_2,
 483             TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 484   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_4,
 485             TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 486   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_8,
 487             TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 488   BOOL_CAS (SYNC_BOOL_COMPARE_AND_SWAP_16,
 489             TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 490
 491   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_1, TSAN_ATOMIC8_COMPARE_EXCHANGE_STRONG),
 492   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_2, TSAN_ATOMIC16_COMPARE_EXCHANGE_STRONG),
 493   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_4, TSAN_ATOMIC32_COMPARE_EXCHANGE_STRONG),
 494   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_8, TSAN_ATOMIC64_COMPARE_EXCHANGE_STRONG),
 495   VAL_CAS (SYNC_VAL_COMPARE_AND_SWAP_16,
 496            TSAN_ATOMIC128_COMPARE_EXCHANGE_STRONG),
 497
 498   LOCK_RELEASE (SYNC_LOCK_RELEASE_1, TSAN_ATOMIC8_STORE),
 499   LOCK_RELEASE (SYNC_LOCK_RELEASE_2, TSAN_ATOMIC16_STORE),
 500   LOCK_RELEASE (SYNC_LOCK_RELEASE_4, TSAN_ATOMIC32_STORE),
 501   LOCK_RELEASE (SYNC_LOCK_RELEASE_8, TSAN_ATOMIC64_STORE),
 502   LOCK_RELEASE (SYNC_LOCK_RELEASE_16, TSAN_ATOMIC128_STORE)
 503 };
 504
 505 /* Instrument an atomic builtin.  */
 506
 507 static void
 508 instrument_builtin_call (gimple_stmt_iterator *gsi)
 509 {
 510   gimple stmt = gsi_stmt (*gsi), g;
 511   tree callee = gimple_call_fndecl (stmt), last_arg, args[6], t, lhs;
 512   enum built_in_function fcode = DECL_FUNCTION_CODE (callee);
 513   unsigned int i, num = gimple_call_num_args (stmt), j;
 514   for (j = 0; j < 6 && j < num; j++)
 515     args[j] = gimple_call_arg (stmt, j);
 516   for (i = 0; i < ARRAY_SIZE (tsan_atomic_table); i++)
 517     if (fcode != tsan_atomic_table[i].fcode)
 518       continue;
 519     else
 520       {
 521         tree decl = builtin_decl_implicit (tsan_atomic_table[i].tsan_fcode);
 522         if (decl == NULL_TREE)
 523           return;
 524         switch (tsan_atomic_table[i].action)
 525           {
 526           case check_last:
 527           case fetch_op:
 528             last_arg = gimple_call_arg (stmt, num - 1);
 529             if (!tree_fits_uhwi_p (last_arg)
 530                 || tree_to_uhwi (last_arg) > MEMMODEL_SEQ_CST)
 531               return;
 532             gimple_call_set_fndecl (stmt, decl);
 533             update_stmt (stmt);
 534             if (tsan_atomic_table[i].action == fetch_op)
 535               {
 536                 args[1] = gimple_call_arg (stmt, 1);
 537                 goto adjust_result;
 538               }
 539             return;
 540           case add_seq_cst:
 541           case add_acquire:
 542           case fetch_op_seq_cst:
 543             gcc_assert (num <= 2);
 544             for (j = 0; j < num; j++)
 545               args[j] = gimple_call_arg (stmt, j);
 546             for (; j < 2; j++)
 547               args[j] = NULL_TREE;
 548             args[num] = build_int_cst (NULL_TREE,
 549                                        tsan_atomic_table[i].action
 550                                        != add_acquire
 551                                        ? MEMMODEL_SEQ_CST
 552                                        : MEMMODEL_ACQUIRE);
 553             update_gimple_call (gsi, decl, num + 1, args[0], args[1], args[2]);
 554             stmt = gsi_stmt (*gsi);
 555             if (tsan_atomic_table[i].action == fetch_op_seq_cst)
 556               {
 557               adjust_result:
 558                 lhs = gimple_call_lhs (stmt);
 559                 if (lhs == NULL_TREE)
 560                   return;
 561                 if (!useless_type_conversion_p (TREE_TYPE (lhs),
 562                                                 TREE_TYPE (args[1])))
 563                   {
 564                     tree var = make_ssa_name (TREE_TYPE (lhs));
 565                     g = gimple_build_assign (var, NOP_EXPR, args[1]);
 566                     gsi_insert_after (gsi, g, GSI_NEW_STMT);
 567                     args[1] = var;
 568                   }
 569                 gimple_call_set_lhs (stmt, make_ssa_name (TREE_TYPE (lhs)));
 570                 /* BIT_NOT_EXPR stands for NAND.  */
 571                 if (tsan_atomic_table[i].code == BIT_NOT_EXPR)
 572                   {
 573                     tree var = make_ssa_name (TREE_TYPE (lhs));
 574                     g = gimple_build_assign (var, BIT_AND_EXPR,
 575                                              gimple_call_lhs (stmt), args[1]);
 576                     gsi_insert_after (gsi, g, GSI_NEW_STMT);
 577                     g = gimple_build_assign (lhs, BIT_NOT_EXPR, var);
 578                   }
 579                 else
 580                   g = gimple_build_assign (lhs, tsan_atomic_table[i].code,
 581                                            gimple_call_lhs (stmt), args[1]);
 582                 update_stmt (stmt);
 583                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 584               }
 585             return;
 586           case weak_cas:
 587             if (!integer_nonzerop (gimple_call_arg (stmt, 3)))
 588               continue;
 589             /* FALLTHRU */
 590           case strong_cas:
 591             gcc_assert (num == 6);
 592             for (j = 0; j < 6; j++)
 593               args[j] = gimple_call_arg (stmt, j);
 594             if (!tree_fits_uhwi_p (args[4])
 595                 || tree_to_uhwi (args[4]) > MEMMODEL_SEQ_CST)
 596               return;
 597             if (!tree_fits_uhwi_p (args[5])
 598                 || tree_to_uhwi (args[5]) > MEMMODEL_SEQ_CST)
 599               return;
 600             update_gimple_call (gsi, decl, 5, args[0], args[1], args[2],
 601                                 args[4], args[5]);
 602             return;
 603           case bool_cas:
 604           case val_cas:
 605             gcc_assert (num == 3);
 606             for (j = 0; j < 3; j++)
 607               args[j] = gimple_call_arg (stmt, j);
 608             t = TYPE_ARG_TYPES (TREE_TYPE (decl));
 609             t = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (t)));
 610             t = create_tmp_var (t);
 611             mark_addressable (t);
 612             if (!useless_type_conversion_p (TREE_TYPE (t),
 613                                             TREE_TYPE (args[1])))
 614               {
 615                 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)),
 616                                          NOP_EXPR, args[1]);
 617                 gsi_insert_before (gsi, g, GSI_SAME_STMT);
 618                 args[1] = gimple_assign_lhs (g);
 619               }
 620             g = gimple_build_assign (t, args[1]);
 621             gsi_insert_before (gsi, g, GSI_SAME_STMT);
 622             lhs = gimple_call_lhs (stmt);
 623             update_gimple_call (gsi, decl, 5, args[0],
 624                                 build_fold_addr_expr (t), args[2],
 625                                 build_int_cst (NULL_TREE,
 626                                                MEMMODEL_SEQ_CST),
 627                                 build_int_cst (NULL_TREE,
 628                                                MEMMODEL_SEQ_CST));
 629             if (tsan_atomic_table[i].action == val_cas && lhs)
 630               {
 631                 tree cond;
 632                 stmt = gsi_stmt (*gsi);
 633                 g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t);
 634                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 635                 t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt);
 636                 cond = build2 (NE_EXPR, boolean_type_node, t,
 637                                build_int_cst (TREE_TYPE (t), 0));
 638                 g = gimple_build_assign (lhs, COND_EXPR, cond, args[1],
 639                                          gimple_assign_lhs (g));
 640                 gimple_call_set_lhs (stmt, t);
 641                 update_stmt (stmt);
 642                 gsi_insert_after (gsi, g, GSI_NEW_STMT);
 643               }
 644             return;
 645           case lock_release:
 646             gcc_assert (num == 1);
 647             t = TYPE_ARG_TYPES (TREE_TYPE (decl));
 648             t = TREE_VALUE (TREE_CHAIN (t));
 649             update_gimple_call (gsi, decl, 3, gimple_call_arg (stmt, 0),
 650                                 build_int_cst (t, 0),
 651                                 build_int_cst (NULL_TREE,
 652                                                MEMMODEL_RELEASE));
 653             return;
 654           default:
 655             continue;
 656           }
 657       }
 658 }
 659
 660 /* Instruments the gimple pointed to by GSI. Return
 661    true if func entry/exit should be instrumented.  */
 662
 663 static bool
 664 instrument_gimple (gimple_stmt_iterator *gsi)
 665 {
 666   gimple stmt;
 667   tree rhs, lhs;
 668   bool instrumented = false;
 669
 670   stmt = gsi_stmt (*gsi);
 671   if (is_gimple_call (stmt)
 672       && (gimple_call_fndecl (stmt)
 673           != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
 674     {
 675       if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
 676         instrument_builtin_call (gsi);
 677       return true;
 678     }
 679   else if (is_gimple_assign (stmt)
 680            && !gimple_clobber_p (stmt))
 681     {
 682       if (gimple_store_p (stmt))
 683         {
 684           lhs = gimple_assign_lhs (stmt);
 685           instrumented = instrument_expr (*gsi, lhs, true);
 686         }
 687       if (gimple_assign_load_p (stmt))
 688         {
 689           rhs = gimple_assign_rhs1 (stmt);
 690           instrumented = instrument_expr (*gsi, rhs, false);
 691         }
 692     }
 693   return instrumented;
 694 }
 695
 696 /* Instruments all interesting memory accesses in the current function.
 697    Return true if func entry/exit should be instrumented.  */
 698
 699 static bool
 700 instrument_memory_accesses (void)
 701 {
 702   basic_block bb;
 703   gimple_stmt_iterator gsi;
 704   bool fentry_exit_instrument = false;
 705
 706   FOR_EACH_BB_FN (bb, cfun)
 707     for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
 708       fentry_exit_instrument |= instrument_gimple (&gsi);
 709   return fentry_exit_instrument;
 710 }
 711
 712 /* Instruments function entry.  */
 713
 714 static void
 715 instrument_func_entry (void)
 716 {
 717   tree ret_addr, builtin_decl;
 718   gimple g;
 719   gimple_seq seq = NULL;
 720
 721   builtin_decl = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
 722   g = gimple_build_call (builtin_decl, 1, integer_zero_node);
 723   ret_addr = make_ssa_name (ptr_type_node);
 724   gimple_call_set_lhs (g, ret_addr);
 725   gimple_set_location (g, cfun->function_start_locus);
 726   gimple_seq_add_stmt_without_update (&seq, g);
 727
 728   builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_ENTRY);
 729   g = gimple_build_call (builtin_decl, 1, ret_addr);
 730   gimple_set_location (g, cfun->function_start_locus);
 731   gimple_seq_add_stmt_without_update (&seq, g);
 732
 733   edge e = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
 734   gsi_insert_seq_on_edge_immediate (e, seq);
 735 }
 736
 737 /* Instruments function exits.  */
 738
 739 static void
 740 instrument_func_exit (void)
 741 {
 742   location_t loc;
 743   basic_block exit_bb;
 744   gimple_stmt_iterator gsi;
 745   gimple stmt, g;
 746   tree builtin_decl;
 747   edge e;
 748   edge_iterator ei;
 749
 750   /* Find all function exits.  */
 751   exit_bb = EXIT_BLOCK_PTR_FOR_FN (cfun);
 752   FOR_EACH_EDGE (e, ei, exit_bb->preds)
 753     {
 754       gsi = gsi_last_bb (e->src);
 755       stmt = gsi_stmt (gsi);
 756       gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
 757                   || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
 758       loc = gimple_location (stmt);
 759       builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
 760       g = gimple_build_call (builtin_decl, 0);
 761       gimple_set_location (g, loc);
 762       gsi_insert_before (&gsi, g, GSI_SAME_STMT);
 763     }
 764 }
 765
 766 /* ThreadSanitizer instrumentation pass.  */
 767
 768 static unsigned
 769 tsan_pass (void)
 770 {
 771   initialize_sanitizer_builtins ();
 772   if (instrument_memory_accesses ())
 773     {
 774       instrument_func_entry ();
 775       instrument_func_exit ();
 776     }
 777   return 0;
 778 }
 779
 780 /* Inserts __tsan_init () into the list of CTORs.  */
 781
 782 void
 783 tsan_finish_file (void)
 784 {
 785   tree ctor_statements = NULL_TREE;
 786
 787   initialize_sanitizer_builtins ();
 788   tree init_decl = builtin_decl_implicit (BUILT_IN_TSAN_INIT);
 789   append_to_statement_list (build_call_expr (init_decl, 0),
 790                             &ctor_statements);
 791   cgraph_build_static_cdtor ('I', ctor_statements,
 792                              MAX_RESERVED_INIT_PRIORITY - 1);
 793 }
 794
 795 /* The pass descriptor.  */
 796
 797 namespace {
 798
 799 const pass_data pass_data_tsan =
 800 {
 801   GIMPLE_PASS, /* type */
 802   "tsan", /* name */
 803   OPTGROUP_NONE, /* optinfo_flags */
 804   TV_NONE, /* tv_id */
 805   ( PROP_ssa | PROP_cfg ), /* properties_required */
 806   0, /* properties_provided */
 807   0, /* properties_destroyed */
 808   0, /* todo_flags_start */
 809   TODO_update_ssa, /* todo_flags_finish */
 810 };
 811
 812 class pass_tsan : public gimple_opt_pass
 813 {
 814 public:
 815   pass_tsan (gcc::context *ctxt)
 816     : gimple_opt_pass (pass_data_tsan, ctxt)
 817   {}
 818
 819   /* opt_pass methods: */
 820   opt_pass * clone () { return new pass_tsan (m_ctxt); }
 821   virtual bool gate (function *)
 822 {
 823   return (flag_sanitize & SANITIZE_THREAD) != 0;
 824 }
 825
 826   virtual unsigned int execute (function *) { return tsan_pass (); }
 827
 828 }; // class pass_tsan
 829
 830 } // anon namespace
 831
 832 gimple_opt_pass *
 833 make_pass_tsan (gcc::context *ctxt)
 834 {
 835   return new pass_tsan (ctxt);
 836 }
 837
 838 namespace {
 839
 840 const pass_data pass_data_tsan_O0 =
 841 {
 842   GIMPLE_PASS, /* type */
 843   "tsan0", /* name */
 844   OPTGROUP_NONE, /* optinfo_flags */
 845   TV_NONE, /* tv_id */
 846   ( PROP_ssa | PROP_cfg ), /* properties_required */
 847   0, /* properties_provided */
 848   0, /* properties_destroyed */
 849   0, /* todo_flags_start */
 850   TODO_update_ssa, /* todo_flags_finish */
 851 };
 852
 853 class pass_tsan_O0 : public gimple_opt_pass
 854 {
 855 public:
 856   pass_tsan_O0 (gcc::context *ctxt)
 857     : gimple_opt_pass (pass_data_tsan_O0, ctxt)
 858   {}
 859
 860   /* opt_pass methods: */
 861   virtual bool gate (function *)
 862     {
 863       return (flag_sanitize & SANITIZE_THREAD) != 0 && !optimize;
 864     }
 865
 866   virtual unsigned int execute (function *) { return tsan_pass (); }
 867
 868 }; // class pass_tsan_O0
 869
 870 } // anon namespace
 871
 872 gimple_opt_pass *
 873 make_pass_tsan_O0 (gcc::context *ctxt)
 874 {
 875   return new pass_tsan_O0 (ctxt);
 876 }